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3454 lines
134 KiB
3454 lines
134 KiB
Thu Feb 16 10:00:00 2018 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.65 (43:0:3) has been released.
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* src/glpk.h, src/api/npp.c
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New API routines for LP/MIP preprocessing were added:
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glp_npp_alloc_wksp allocate the preprocessor workspace
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glp_npp_load_prob load original problem instance
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glp_npp_preprocess1 perform basic LP/MIP preprocessing
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glp_npp_build_prob build resultant problem instance
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glp_npp_postprocess postprocess solution to resultant problem
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glp_npp_obtain_sol obtain solution to original problem
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glp_npp_free_wksp free the preprocessor workspace
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See doc/npp.txt for detailed description of these API routines.
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* examples/nppsamp.c
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An example program to demonstrate using of LP/MIP preprocessor
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was added.
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The following modules were renamed to simplify maintenance.
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* src/draft/glpnpp.h RENAMED -> src/npp/npp.h
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* src/draft/glpnpp01.c RENAMED -> src/npp/npp1.c
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* src/draft/glpnpp02.c RENAMED -> src/npp/npp2.c
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* src/draft/glpnpp03.c RENAMED -> src/npp/npp3.c
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* src/draft/glpnpp04.c RENAMED -> src/npp/npp4.c
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* src/draft/glpnpp05.c RENAMED -> src/npp/npp5.c
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* src/draft/glpnpp06.c RENAMED -> src/npp/npp6.c
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* src/bflib/fvs.h RENAMED -> src/misc/fvs.h
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* src/bflib/fvs.c RENAMED -> src/misc/fvs.c
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* src/draft/glpios.h RENAMED -> src/draft/ios.h
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* src/cglib/ RENAMED -> src/intopt/
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* src/draft/glpios10.c RENAMED -> src/intopt/fpump.c
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* src/glpk.h, src/intopt/covgen.c
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A new, more robust implementation of locally valid simple cover
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cuts was included in the MIP solver.
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* src/draft/ios.h, src/draft/glpios01.c, src/draft/glpios03.c
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These modules were changed to use the new cover cut generator.
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* src/misc/ks.c, src/misc/ks.h
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Routines to solve 0-1 knapsack problem (used by the new cover
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cut generator) were added.
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* src/misc/mt1.c, src/misc/mt1.h, src/misc/mt1.f
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Routines to solve 0-1 knapsack problem with Martello & Toth
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algorithm (used by the new cover cut generator) were added.
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(The original Fortran 77 code mt1.f is included for reference
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purposes only.)
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* src/draft/glpapi09.c
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The API routine glp_init_iocp was changed to enable long-step
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dual simplex by default.
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* src/api/cplex.c
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The internal routine col_name routine was changed to construct
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a fake column name depending on the column's attributes.
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* examples/glpsol.c
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A new option --hide was added. This option removes all symbolic
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names from the model being processed.
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* src/env/stdc.h
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CDECL macro was added. (This macro is defined by config.h only
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on building the GLPK DLL with MSVC.)
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The following modules affected by this change were changed:
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* src/api/cpxbas.c
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* src/draft/glpios11.c
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* src/intopt/cfg1.c
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* src/intopt/fpump.c
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* src/intopt/gmigen.c
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* src/intopt/mirgen.c
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* src/misc/wclique1.c
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* src/simplex/spxchuzr.c
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* src/simplex/spychuzc.c
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Sat Dec 02 12:00:00 2017 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.64 (42:3:2) has been released.
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* src/simplex/spydual.c
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The internal routine play_coef of the dual simplex solver was
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changed to perform more aggressive perturbation to prevent dual
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degeneracy and avoid stalling even if the current dual basic
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solution is strongly feasible (mainly if the objective is zero,
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so all reduced costs are always zero). Thanks to David Monniaux
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<David.Monniaux@univ-grenoble-alpes.fr> for bug report.
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* src/draft/glpssx.h, glpssx02.c, glpapi07.c
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The exact simplex solver routines were changed to perform
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terminal output according to the verbosity level (specified by
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the control parameter smcp.msg_lev). Thanks to Jeroen Demeyer
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<jdemeyer@cage.ugent.be> for bug report.
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* src/simplex/spxchuzr.c
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The directive #include <config.h> was added. Thanks to Heinrich
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Schuchardt <xypron.glpk@gmx.de> for bug report.
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* examples/graceful.mod
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An example model in MathProg was added. Thanks to Mike Appleby
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<mike@app.leby.org> for contribution.
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* examples/powpl25h.mod powplant.mod wolfra6d.lp wolfra6d.mod
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Three example models in MathProg and one in Cplex LP format
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were added. Thanks to Peter Naszvadi <vuk@cs.elte.hu> for
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contribution.
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Tue Jul 25 12:00:00 2017 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.63 (42:2:2) has been released.
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* src/simplex/spxchuzr.h, src/simplex/spxchuzr.c
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An experimental feature (phase I long-step ratio test) was
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included in the primal simplex solver.
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* src/simplex/spxprim.c, src/simplex/spydual.c
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An internal scaling of the objective coefficients was added to
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the primal and dual simplex solvers.
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* src/simplex/spxprim.c
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A minor bug was fixed (correction of flags of fixed non-basic
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variables after removing the perturbation).
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* src/glpk.h, src/glpapi06.c
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New smcp parameters were added (not documented yet):
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int excl (default: GLP_ON)
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Internal simplex solver option:
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GLP_ON - exclude fixed non-basic variables from the working LP;
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GLP_OFF - keep original variables in the working LP.
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int shift (default: GLP_ON)
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Internal simplex solver option:
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GLP_ON - shift bounds of variables in the working LP tow. zero;
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GLP_OFF - keep original bounds of variables in the working LP.
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int aorn (default: GLP_USE_NT)
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Internal simplex solver option:
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GLP_USE_AT - use A matrix in sparse row-wise format;
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GLP_USE_NT - use N matrix in sparse row-wise format.
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Parameter out_frq was changed to specify the output frequency
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in milliseconds rather than in simplex iterations.
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src/env/time.c
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The Posix version of glp_time was replaced by new one, which
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doesn't use gmtime functions to improve portability. Thanks to
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Rob Schroeder <Rob.Schroeder@graphicpkg.com> for bug report.
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src/spv.c, src/spv.h
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These files were moved to src/cglib/, since they are used only
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in the MIR cuts generator.
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examples/life_goe.mod, examples/tiling.mod, examples/toto.mod
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Three new example models in MathProg were added. Thanks to
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Peter Naszvadi <vuk@cs.elte.hu> for contribution.
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Wed Jun 14 12:00:00 2017 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.62 (42:1:2) has been released.
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* src/simplex/spxprim.c
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An experimental feature (bound perturbation) to improve
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numerical stabilty and avoid cycling was included in the primal
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simplex solver. Currently it is enabled by default.
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* src/simplex/spxprim.c
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Some dense vectors were replaced by sparse ones in full-vector
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storage (FVS) format.
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* src/simplex/spxprim.c, src/simplex/spydual.c
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Assertions trow[q] != 0.0 and tcol[p] != 0.0 were replaced by
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setting an error code to prevent abnormal termination. Thanks
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to Chris Matrakidis <cmatraki@gmail.com> for patch.
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* src/simplex/spydual.c
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Removing perturbation was added if the perturbed problem is
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dual infeasible while the original one is dual feasible. Thanks
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to Chris Matrakidis <cmatraki@gmail.com> for patch.
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* src/api/mps.c
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A range bug was fixed.
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Thanks to Chris Matrakidis <cmatraki@gmail.com> for patch.
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* src/minisat/minisat.c
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Changes were made to provide 64-bit portability. Thanks to
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Chris Matrakidis <cmatraki@gmail.com> for patch.
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* src/api/minisat1.c
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Changes related to the minisat solver were made. Thanks to
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Chris Matrakidis <cmatraki@gmail.com> for patch.
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* src/api/intfeas1.c
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Changes were made to skip objective integrality check when
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no objective bound is specified. Thanks to Chris Matrakidis
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<cmatraki@gmail.com> for patch.
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* src/glphbm.c, src/glprgr.c, src/env/stream.c, src/env/time.c,
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* src/mpl/mpl5.c, src/mpl/mpl6.c, src/mpl/mplsql.c
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Calls to non-thread-safe functions gmtime, strerror, and strtok
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were replaced by calls to corresponding thread-safe equivalents
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(gmtime_r, strerror_r, and strtok_r for GNU/Linux).
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* w32/*.def, w64/*.def
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glp_config symbol was added. Thanks to Heinrich Schuchardt
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<xypron.glpk@gmx.de> for bug report.
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* examples/pbn/pbn.mod
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A bug was fixed (model didn't work for odd number of rows or
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columns). Thanks to Chris Matrakidis <cmatraki@gmail.com> for
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bug report and patch provided.
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Sun Jan 22 12:00:00 2017 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.61 (42:0:2) has been released.
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The following modules were renamed to simplify maintenance.
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* src/prob.h RENAMED -> src/api/prob.h
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* src/glpapi01.c RENAMED -> src/api/prob1.c
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* src/glpapi02.c RENAMED -> src/api/prob2.c
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* src/glpapi03.c RENAMED -> src/api/prob3.c
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* src/glpapi04.c RENAMED -> src/api/prob4.c
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* src/glpapi05.c RENAMED -> src/api/prob5.c
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* src/env/tls.c
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TLS (thread local storage class specifier) option was added;
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see comments in tls.c for details.
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* configure.ac, config.h.in
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Test for TLS was added.
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Thanks to David Monniaux <david.monniaux@imag.fr> for
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suggestion and Chris Matrakidis <cmatraki@gmail.com> for patch.
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* src/env/tls.c
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Dll support was added.
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Thanks to Heinrich Schuchardt <xypron.glpk@gmx.de> for
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contribution.
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The following modules were changed to add __cdecl specifier
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for functions passed to qsort (this is needed only on compiling
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GLPK with MSVC to run under MS Windows).
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* src/api/cpxbas.c
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* src/cglib/cfg1.c
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* src/cglib/gmigen.c
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* src/cglib/mirgen.c
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* src/misc/wclique1.c
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* src/simplex/spychuzc.c
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* src/glpios10.c
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* src/glpios11.c
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* examples/glpsol.c
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* src/glpk.h, src/env/env.c
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The API routine glp_version was changed to avoid initialization
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of the GLPK environment. The new API routine glp_config was
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added (but not documented yet). Thanks to Heinrich Schuchardt
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<xypron.glpk@gmx.de> for suggestion.
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* INSTALL
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Description of the configure option '--with-zlib' was removed.
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Thanks to Balaco Baco <balacobaco@imap.cc> for bug report.
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Fri Apr 01 12:00:00 2016 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.60 (41:0:1) has been released.
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* src/glpk.h
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Declarations of all non-documented API routines were hidden by
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#ifdef GLP_UNDOC / #endif.
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src/simplex/spydual.c
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An experimental feature (objective coefficient perturbation)
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to improve numerical stabilty and avoid cycling was included in
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the dual simplex solver.
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This release also includes all the changes made in 4.59.2 and
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4.59.1 non-official test releases (see below).
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Fri Mar 18 12:00:00 2016 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.59.2 (40:1:0) has been released.
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NOTE: THIS IS A NON-OFFICIAL TEST RELEASE.
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src/simplex/spxprim.c
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Improvements were made in the internal routine choose_pivot to
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prevent choosing a too small pivot in the primal simplex.
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src/simplex/spydual.c
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Improvements were made in the internal routine choose_pivot to
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prevent choosing a too small pivot in the dual simplex.
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src/simplex/spychuzc.c
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The internal routine spy_eval_bp was added to determine break-
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points of the dual objective function.
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src/simplex/spydual.c
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An experimental feature (long-step ratio test) was included in
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the dual simplex.
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src/glpk.h, src/glpapi06.c
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The GLP_RT_FLIP option (long-step ratio test) was added to
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the simplex solver. Currently it affects only the dual simplex.
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For the primal simplex it is equivalent to GLP_RT_HAR.
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src/examples/glpsol.c
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The '--flip' command-line option was added to glpsol (long-step
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dual ratio test).
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src/proxy/proxy1.c
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Additional check was added to reject wrong solutions somwtimes
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reported by the PROXY heuristic.
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src/glpios10.c
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A bug (memory leak) was fixed in the FPUMP heuristic routine.
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Thanks to <nicolas.derhy@engie.com> for bug report.
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Tue Mar 15 12:00:00 2016 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.59.1 (40:1:0) has been released.
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NOTE: THIS IS A NON-OFFICIAL BUG-FIX RELEASE.
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* src/simplex/mpl6.c, src/simplex/sql.c, src/simplex/sql.h
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The header sql.h was renamed to avoid conflicts with standard
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ODBC headers. Thanks to Noli Sicad <nsicad@gmail.com> for bug
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report.
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* src/simplex/spychuzc.c, src/simplex/spychuzc.h
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Minor changes were made.
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Fri Mar 11 12:00:00 2016 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.59 (40:0:0) has been released.
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* src/sgf.c, src/sgf.h
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The routines sgf_reduce_nuc and sgf_factorize were changed to
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correctly report structural singularity.
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* src/glpios01.c
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The routine ios_solve_node was changed to retry solving node
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problem in case of the simplex solver failure. Thanks to Chris
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Matrakidis <cmatraki@gmail.com> for patch.
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* src/glpios03.c
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The routine ios_driver was changed to correctly process the
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root node. Thanks to Chris Matrakidis <cmatraki@gmail.com> for
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patch.
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* src/glpios06.c
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Some improvements were made in the MIR cut generation routines.
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Thanks to Chris Matrakidis <cmatraki@gmail.com> for patch.
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The following source modules were splitted/renamed to simplify
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maintenance.
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* src/glpios04.c RENAMED -> src/spv.c
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* src/glpios05.c glp_gmi_cut (new) -> src/cglib/gmicut.c
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* src/glpios05.c glp_gmi_gen (new) -> src/cglib/gmigen.c
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* src/glpios05.c REMOVED
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* src/glpios06.c glp_mir_init (new) -> src/cglib/mirgen.c
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* src/glpios06.c glp_mir_gen (new) -> src/cglib/mirgen.c
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* src/glpios06.c glp_mir_free (new) -> src/cglib/mirgen.c
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* src/glpios06.c REMOVED
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* src/glpios08.c glp_cfg_init (new) -> src/cglib/cfg2.c
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* src/glpios08.c glp_cfg_free (new) -> src/cglib/cfg2.c
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* src/glpios08.c glp_clq_cut (new) -> src/cglib/clqcut.c
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* src/glpios08.c REMOVED
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* src/glpmpl.h RENAMED -> src/mpl/mpl.h
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* src/glpmpl01.c RENAMED -> src/mpl/mpl1.c
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* src/glpmpl02.c RENAMED -> src/mpl/mpl2.c
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* src/glpmpl03.c RENAMED -> src/mpl/mpl3.c
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* src/glpmpl04.c RENAMED -> src/mpl/mpl4.c
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* src/glpmpl05.c RENAMED -> src/mpl/mpl5.c
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* src/glpmpl06.c RENAMED -> src/mpl/mpl6.c
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* src/glpsql.h RENAMED -> src/mpl/sql.h
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* src/glpsql.c RENAMED -> src/mpl/sql.c
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* src/proxy/proxy.c
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Minor bug was fixed in the PROXY heuristic routine. Thanks to
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Chris Matrakidis <cmatraki@gmail.com> for bug report.
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* src/cglib/gmicut.c, src/glpk.h
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New API routine glp_gmi_cut was added (not documented yet).
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* src/cglib/gmigen.c, src/glpk.h
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New API routine glp_gmi_gen was added (not documented yet).
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* src/cglib/mirgen.c, src/glpk.h
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New API routines glp_mir_init, glp_mir_gen, and glp_mir_free
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were added (not documented yet).
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* src/cglib/cfg2.c, src/glpk.h
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New API routines glp_cfg_init and glp_cfg_free were added (not
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documented yet).
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* src/cglib/clqcut.c, src/glpk.h
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New API routine glp_clq_cut was added (not documented yet).
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* src/api/rdcc.c, src/api/wrcc.c
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API routines glp_read_graph and glp_write_graph were changed
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due to changes in the data format. For details see the document
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"GLPK: Graph and Network Routines".
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* src/api/rdgr.c, src/api/wrgr.c, src/glpsdf.c, src/glpsdf.h
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Old versions of API routines glp_read_graph and glp_write_graph
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were removed.
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* doc/gmpl_pt-BR.tex, doc/gmpl_pt-BR.pdf
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Translation of the document "Modeling Language GNU MathProg"
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to Brazilian Portuguese (pt-BR) was included (in LaTeX and pdf
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formats). Thanks to Joao Flavio de Freitas Almeida
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<joao.flavio@dep.ufmg.br> for contribution.
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Thu Feb 18 12:00:00 2016 Andrew Makhorin <mao@gnu.org>
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* GLPK 4.58 (39:0:0) has been released.
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* src/misc/dimacs.c, src/misc/dimacs.h
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Routines to read data files in DIMACS format were implemented
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as a separate module.
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The following source modules were splitted/renamed to simplify
|
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maintenance.
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* src/glpapi11.c glp_print_sol -> src/api/prsol.c
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* src/glpapi11.c glp_read_sol -> src/api/rdsol.c
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* src/glpapi11.c glp_write_sol -> src/api/wrsol.c
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* src/glpapi11.c glp_print_ipt -> src/api/pript.c
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* src/glpapi11.c glp_read_ipt -> src/api/rdipt.c
|
|
* src/glpapi11.c glp_write_ipt -> src/api/wript.c
|
|
* src/glpapi11.c glp_print_mip -> src/api/prmip.c
|
|
* src/glpapi11.c glp_read_mip -> src/api/rdmip.c
|
|
* src/glpapi11.c glp_write_mip -> src/api/wrmip.c
|
|
* src/glpapi11.c glp_print_ranges -> src/api/prrngs.c
|
|
* src/glpapi11.c REMOVED
|
|
* src/glpapi14.c RENAMED -> src/api/mpl.c
|
|
* src/glpapi15.c glp_read_graph -> src/api/rdgr.c
|
|
* src/glpapi15.c glp_write_graph -> src/api/wrgr.c
|
|
* src/glpapi15.c REMOVED
|
|
* src/glpapi16.c glp_weak_comp -> src/api/weak.c
|
|
* src/glpapi16.c glp_strong_comp -> src/api/strong.c
|
|
* src/glpapi16.c glp_top_sort -> src/api/topsort.c
|
|
* src/glpapi16.c REMOVED
|
|
* src/glpapi17.c glp_mincost_lp -> src/api/mcflp.c
|
|
* src/glpapi17.c glp_mincost_okalg -> src/api/mcfokalg.c
|
|
* src/glpapi17.c glp_mincost_relax4 -> src/api/mcfrelax.c
|
|
* src/glpapi17.c glp_maxflow_lp -> src/api/maxflp.c
|
|
* src/glpapi17.c glp_maxflow_ffalg -> src/api/maxffalg.c
|
|
* src/glpapi17.c glp_check_asnprob -> src/api/ckasn.c
|
|
* src/glpapi17.c glp_asnprob_lp -> src/api/asnlp.c
|
|
* src/glpapi17.c glp_asnprob_okalg -> src/api/asnokalg.c
|
|
* src/glpapi17.c glp_asnprob_hall -> src/api/asnhall.c
|
|
* src/glpapi17.c glp_cpp -> src/api/cpp.c
|
|
* src/glpapi17.c REMOVED
|
|
* src/glpapi18.c glp_wclique_exact -> src/api/wcliqex.c
|
|
* src/glpapi18.c REMOVED
|
|
* src/glpapi19.c RENAMED -> src/api/minisat1.c
|
|
* src/glpapi20.c RENAMED -> src/api/intfeas1.c
|
|
* src/glpapi21.c RENAMED -> examples/glpsol.c
|
|
* src/glpcpx.c RENAMED -> src/api/cplex.c
|
|
* src/glpdmx.c glp_read_mincost -> src/api/rdmcf.c
|
|
* src/glpdmx.c glp_write_mincost -> src/api/wrmcf.c
|
|
* src/glpdmx.c glp_read_maxflow -> src/api/rdmaxf.c
|
|
* src/glpdmx.c glp_write_maxflow -> src/api/wrmaxf.c
|
|
* src/glpdmx.c glp_read_asnprob -> src/api/rdasn.c
|
|
* src/glpdmx.c glp_write_asnprob -> src/api/wrasn.c
|
|
* src/glpdmx.c glp_read_ccdata -> src/api/rdcc.c
|
|
* src/glpdmx.c glp_write_ccdata -> src/api/wrcc.c
|
|
* src/glpdmx.c glp_read_prob -> src/api/rdprob.c
|
|
* src/glpdmx.c glp_write_prob -> src/api/wrprob.c
|
|
* src/glpdmx.c glp_read_cnfsat -> src/api/rdcnf.c
|
|
* src/glpdmx.c glp_write_cnfsat -> src/api/wrcnf.c
|
|
* src/glpdmx.c glp_check_cnfsat -> src/api/ckcnf.c
|
|
* src/glpdmx.c REMOVED
|
|
* src/glpgmp.c RENAMED -> src/misc/mygmp.c
|
|
* src/glpini01.c RENAMED -> src/api/advbas.c
|
|
* src/glpini02.c RENAMED -> src/api/cpxbas.c
|
|
* src/glpmps.c RENAMED -> src/api/mps.c
|
|
* src/glpnet03.c RENAMED -> src/api/netgen.c
|
|
* src/glpnet04.c RENAMED -> src/api/gridgen.c
|
|
* src/glpnet05.c RENAMED -> src/api/rmfgen.c
|
|
|
|
The following source modules were changed due to changes in the
|
|
data formats:
|
|
* src/api/rdsol.c
|
|
* src/api/wrsol.c
|
|
* src/api/rdipt.c
|
|
* src/api/wript.c
|
|
* src/api/rdmip.c
|
|
* src/api/wrmip.c
|
|
|
|
* src/glpk.h
|
|
New API routines were added: glp_mpl_init_rand (not documented
|
|
yet), glp_time, glp_difftime. The API routine glp_main (glpsol
|
|
main routine) was removed.
|
|
|
|
* src/glpmpl.h, src/glpmpl01.c, src/glpmpl03.c
|
|
The function tan (trigonometric tangent) was added to MathProg.
|
|
Thanks to Chris Matrakidis <cmatraki@gmail.com> for patch.
|
|
|
|
* src/simplex/spydual.c
|
|
A minor typo in dual simplex (GLP_EITLIM instead of GLP_ETMLIM)
|
|
was fixed. Thanks to Chris Matrakidis <cmatraki@gmail.com> for
|
|
patch.
|
|
|
|
* src/glpapi09.c, src/glpios01.c, src/glpios03.c
|
|
A time limit problem was fixed. Thanks to Chris Matrakidis
|
|
<cmatraki@gmail.com> for patch.
|
|
|
|
* doc/gmpl_es.tex, doc/gmpl_es.pdf
|
|
A new version of the document "Modeling Language GNU MathProg"
|
|
in Spanish was included (in LaTeX and pdf formats). Thanks to
|
|
Pablo Yapura <ypf@agro.unlp.edu.ar> for contribution.
|
|
|
|
* configure.ac
|
|
A check to determine if libtool needs '-no-undefined' flag to
|
|
build shared libraries on some platforms was added.
|
|
Thanks to Marco Atzeri <marco.atzeri@gmail.com> and Heinrich
|
|
Schuchardt <xypron.glpk@gmx.de> for suggestion.
|
|
|
|
* autogen.sh
|
|
A script to regenerate the configure script and the Makefiles
|
|
was added. Thanks to Heinrich Schuchardt <xypron.glpk@gmx.de>.
|
|
|
|
* w32/glpk.def, w64/glpk.def
|
|
'glp_at_error' symbol was added to the export list. Thanks to
|
|
Heinrich Schuchardt <xypron.glpk@gmx.de> for bug report.
|
|
|
|
Sun Nov 08 12:00:00 2015 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.57 (38:0:2) has been released.
|
|
|
|
* src/simplex/spy*.*
|
|
New, more efficient implementation of the dual simplex method
|
|
was included in the package.
|
|
|
|
* src/simplex/spxprim.c
|
|
Incorrect directive #ifdef USE_AT was changed to #if USE_AT.
|
|
|
|
* src/simplex/simplex.h
|
|
New header for simplex-based drivers was added.
|
|
|
|
* src/glpspx02.c
|
|
Old implementation of the dual simplex method was removed from
|
|
the package.
|
|
|
|
* src/glpspx.h
|
|
Old header for simplex-based drivers was removed.
|
|
|
|
* src/glpapi06.c
|
|
Call to spx_dual was changed to spy_dual.
|
|
tol_piv = 1e-10 in glp_init_smcp was changed to 1e-9 (this new
|
|
tolerance seems to be more adequate for new implementations of
|
|
the primal and dual simplex methods).
|
|
|
|
* src/glpk.h, src/glpapi09.c, src/glpios03.c
|
|
Option iocp.sr_heur to enable/disable simple rounding heuristic
|
|
was added. Thanks to Chris Matrakidis <cmatraki@gmail.com> for
|
|
suggestion.
|
|
|
|
* src/env/env.h src/env/error.c
|
|
API routine glp_at_error was added and documented. Thanks to
|
|
Jeroen Demeyer <jdemeyer@cage.ugent.be> for suggestion.
|
|
|
|
* src/glpapi19.c
|
|
Translation of MiniSat solver (src/minisat) from C++ to C is
|
|
made by a non-skilled programmer who converts pointers to ints
|
|
and vice versa, so MiniSat works on 32-bit platforms only.
|
|
Fixing this portability issue would require rewriting the code,
|
|
so currently to prevent crashing the API routine glp_minisat1
|
|
was changed just to report failure if 64-bit version of GLPK is
|
|
used. Thanks to Heinrich Schuchardt <xypron.glpk@gmx.de> for
|
|
bug report.
|
|
|
|
* doc/glpk.tex, doc/gmpl.tex
|
|
Some material was added according to changes in GLPK API.
|
|
Also some minor typos were corrected. Thanks to Anton Voropaev
|
|
<anton.n.voropaev@gmail.com> for typo report.
|
|
|
|
* w32/makefiles, w64/makefiles
|
|
Option /Zi was added to pass to MSVC compiler.
|
|
|
|
examples/tsp/*.*
|
|
An example application program TSPSOL was added. This program
|
|
is intended to solve the Symmetric Traveling Salesman Problem.
|
|
For more details see examples/tsp/README.
|
|
|
|
Thu Oct 01 12:00:00 2015 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.56 (37:3:1) has been released.
|
|
|
|
* src/simplex/*.c, *.h
|
|
New, more efficient and robust implementation of the primal
|
|
simplex method was included in the package.
|
|
|
|
* src/glpspx01.c
|
|
Old implementation of the primal simplex method was removed
|
|
from the package.
|
|
|
|
* src/bflib/sgf.c
|
|
A bug was fixed in routine sgf_reduce_nuc. (The bug appeared if
|
|
the basis matrix was structurally singular.) Thanks to Martin
|
|
Jacob <mj@bahntechnik.de> for bug report.
|
|
|
|
* w32/*.*, w64/*.*
|
|
Scripts to build GLPK with Microsoft Visual Studio 2015 were
|
|
added. Thanks to Xypron <xypron.glpk@gmx.de> for contribution
|
|
and testing.
|
|
|
|
Fri Aug 22 12:00:00 2014 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.55 (37:2:1) has been released.
|
|
|
|
* src/bflib/luf.c, src/bflib/luf.h
|
|
Two routines luf_vt_solve1 and luf_estimate_norm were added to
|
|
estimate 1-norm of matrix inverse.
|
|
|
|
* src/bflib/btf.c, src/bflib/btf.h
|
|
Two routines btf_at_solve1 and btf_estimate_norm were added to
|
|
estimate 1-norm of block triangular matrix inverse.
|
|
|
|
* src/bflib/fhvint.c, src/bflib/fhvint.h
|
|
The routine fhvint_estimate was added to estimate 1-norm of the
|
|
basis matrix inverse (FHV-factorization).
|
|
|
|
* src/bflib/scfint.c, src/bflib/scfint.h
|
|
The routine scfint_estimate was added to estimate 1-norm of the
|
|
basis matrix inverse (Schur-complement-based factorization).
|
|
|
|
* src/bfd.c, src/bfd.c
|
|
The routine bfd_condest was added to estimate the condition of
|
|
the basis matrix.
|
|
|
|
* src/bflib/scfint.h
|
|
The prefix '_glp' was added to keep the namespace clean.
|
|
|
|
* src/env/stream.c
|
|
Two open modes "a" and "ab" were added. Thanks to Pedro P. Wong
|
|
<d00604@taipower.com.tw> for bug report.
|
|
|
|
* src/glpapi21.c (glpsol)
|
|
Minor bug was fixed (command-line options --btf, --cbg, --cgr
|
|
didn't work properly).
|
|
|
|
* src/bflib/sgf.c
|
|
A serious bug was fixed in a basis factorization routine used
|
|
on the dense phase. (The bug might appear only if the number of
|
|
rows exceeded sqrt(2**31) ~= 46,340 and caused access violtaion
|
|
exception because of integer overflow.) Thanks to Mark Meketon
|
|
<Marc.Meketon@oliverwyman.com> for bug report.
|
|
|
|
* doc/glpk.tex
|
|
Two API routines glp_alloc and glp_realloc were documented.
|
|
Thanks to Brian Gladman <brg@gladman.plus.com> for suggestion.
|
|
|
|
* doc/gmpl_es.tex, doc/gmpl_es.pdf
|
|
Translation of the document "Modeling Language GNU MathProg"
|
|
to Spanish was included (in LaTeX and pdf formats). Thanks to
|
|
Pablo Yapura <ypf@agro.unlp.edu.ar> for contribution.
|
|
|
|
Fri Mar 28 12:00:00 2014 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.54 (37:1:1) has been released.
|
|
|
|
* src/bflib/fhvint.h, fhvint.c
|
|
Some technical changes were made.
|
|
|
|
* src/bflib/btf.h, btf.c, btfint.h, btfint.c
|
|
The module BTF was added to the package. It implements sparse
|
|
block triangular factorization of a square non-singular matrix
|
|
and is based on LU-factorization (see the LUF module).
|
|
|
|
* src/bflib/scf.h, scf.c, scfint.h, scfint.c
|
|
The module SCF was added to the package. It implements sparse
|
|
factorization of a square non-singular matrix based on Schur
|
|
complement and LU-factorization (plain or block triangular; see
|
|
the LUF and BTF modules).
|
|
|
|
* src/bfd.c
|
|
LP basis factorization driver was changed to use most recent
|
|
versions of the FHV and SCF modules.
|
|
|
|
* src/glplpf.h, glplpf.c
|
|
Old version of the Schur-complement-based factorization module
|
|
was removed from the package.
|
|
|
|
* src/glpk.h
|
|
New flags GLP_BF_LUF, GLP_BF_BTF were added for glp_bfcp.
|
|
|
|
* src/glpapi12.c
|
|
The API routines glp_get_bfcp, glp_set_bfcp were replaced due
|
|
to new version of the BFD module.
|
|
|
|
* src/glpapi21.c
|
|
New command-line options --luf, --btf, --ft, --cbg, and --cgr
|
|
were added for the glpsol solver.
|
|
|
|
* src/*
|
|
According to a new version of the GNU Coding Standards in all
|
|
messages a grave accent character (`) was replaced by a single
|
|
apostrophe character (').
|
|
|
|
* src/glpapi09.c mip status bug was fixed. Thanks to Remy Roy
|
|
<remyroyster@gmail.com> for bug report.
|
|
|
|
* doc/glpk.tex
|
|
Some comments about invalidating the basis factorization were
|
|
added. Thanks to Xypron <xypron.glpk@gmx.de> for suggestion.
|
|
|
|
* configure.ac
|
|
"iodbc-config --cflags" was added to detect iodbc flags. Thanks
|
|
to Sebastien Villemot <sebastien@debian.org> for patch.
|
|
|
|
Thu Feb 13 12:00:00 2014 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.53 (37:0:1) has been released.
|
|
|
|
* src/glpmps.c (glp_read_mps)
|
|
The code was changed to remove free rows at the end.
|
|
|
|
* src/glpcpx.c (glp_read_lp)
|
|
A bug was fixed (explicit bounds for binaries not set). Thanks
|
|
to Gabriel Hackebeil <gabehack@gmail.com> for bug report.
|
|
|
|
* src/glpenv07.c (z_fgetc)
|
|
A bug was fixed (Z_STREAM_END -> Z_OK). Thanks to Achim Gaedke
|
|
<achim.gaedke@gmail.com> for bug report.
|
|
|
|
* src/glpenv07.c
|
|
Replaced by src/env/stream.c.
|
|
|
|
* src/glpenv08.c
|
|
Replaced by src/env/dlsup.c.
|
|
|
|
* src/bflib/ifu.h, src/bflib/ifu.c
|
|
Re-implemented.
|
|
|
|
* src/glpscf.h, src/glpscf.c
|
|
Replaced by IFU.
|
|
|
|
* src/glplpf.h, src/glplpf.c
|
|
Changed due to IFU.
|
|
|
|
* src/glpbfd.c
|
|
Changed due to LPF.
|
|
|
|
* src/glpapi06.c
|
|
Two API routines glp_get_it_cnt and glp_set_it_cnt were added.
|
|
Thanks to Joey Rios <joeylrios@hotmail.com> for suggestion.
|
|
|
|
* src/glplpx.h, src/glplpx01.c, src/glplpx02.c, src/glplpx03.c
|
|
All obsolete API routines were completely removed.
|
|
|
|
* examples/oldapi/lpx.h, examples/oldapi/lpx.c
|
|
A set of routines that simulate the old GLPK API (as defined
|
|
in 4.48) were added. Thanks to Jan Engelhardt <jengelh@inai.de>
|
|
for suggestion.
|
|
|
|
* src/zlib/*
|
|
zlib 1.2.7 was downgraded to zlib 1.2.5 (from glpk 4.50) due to
|
|
bugs detected in zlib 1.2.7 on some 64-bit platforms. Thanks to
|
|
Carlo Baldassi <carlobaldassi@gmail.com> for bug report.
|
|
|
|
* src/glpsql.c
|
|
Alignment bug was fixed. Thanks to Xypron <xypron.glpk@gmx.de>
|
|
for suggestion.
|
|
|
|
* src/glpsql.c
|
|
#include <my_global.h> and #include <my_sys.h> were commented
|
|
out to fix a namespace bug on compiling with MariaDB. Thanks to
|
|
Xypron <xypron.glpk@gmx.de> for suggestion.
|
|
|
|
Sun Jul 28 12:00:00 2013 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.52.1 (36:1:0) has been released.
|
|
|
|
* src/Makefile.am
|
|
Version information bug was fixed. Thanks to Sebastien Villemot
|
|
<sebastien@debian.org> for bug report.
|
|
|
|
* src/proxy/proxy.c
|
|
A minor bug (incorrect use of glp_term_out) was fixed.
|
|
|
|
* src/glpios03.c
|
|
The simple rounding heuristic routine was changed to check only
|
|
global constraints.
|
|
|
|
* src/glpcpx.c
|
|
The code was changed to issue the warning message 'lower/upper
|
|
bound redefined' only once.
|
|
|
|
Thu Jul 18 12:00:00 2013 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.52 (36:0:1) has been released.
|
|
|
|
* src/misc/wclique1.h, src/misc/wclique1.c
|
|
Greedy heuristic to find maximum weight clique was implemented.
|
|
|
|
* src/cglib/cfg.h, src/cglib/cfg.c, src/cglib/cfg1.c
|
|
Conflict graph routines (used to generate clique cuts) were
|
|
implemented.
|
|
|
|
* src/glpios08.c
|
|
New version of the clique cut generator was implemented. Now it
|
|
is able to efficiently process very large and/or dense conflict
|
|
graphs. Old rudimentary version was removed from the package.
|
|
|
|
* examples/misp1.dat, examples/misp2.dat
|
|
Two data files for the maximum independent set problem (MISP)
|
|
were added to illustrate efficiency of using the clique cuts.
|
|
|
|
* src/glpios03.c
|
|
Simple rounding heuristic applied for every node subproblem was
|
|
implemented.
|
|
|
|
* proxy/proxy.c
|
|
Some bugs were fixed in the proximity search heuristic routine.
|
|
Thanks to Giorgio Sartor <0gioker0@gmail.com>.
|
|
|
|
* src/glpapi21.c
|
|
New command-line option '--proxy [nnn]' was added to glpsol to
|
|
enable using the proximity search heuristic.
|
|
|
|
* src/glpspx02.c
|
|
A feature was added to switch to the primal simplex in case of
|
|
stalling due to dual degeneracy (for GLP_DUALP only).
|
|
|
|
* src/glpmps.c
|
|
A bug (incorrect processing of LI column indicator) was fixed
|
|
in the mps format reading routine. Thanks to Charles Brixko for
|
|
bug report.
|
|
|
|
Wed Jun 19 12:00:00 2013 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.51 (36:0:0) has been released.
|
|
|
|
* src/bflib/sgf.c, src/bflib/sgf.h
|
|
Singleton and dense phases of sparse Gaussian factorizer were
|
|
implemented.
|
|
|
|
* src/bflib/lufint.c, src/bflib/lufint.h
|
|
Interface routines to LU-factorization were added.
|
|
|
|
* src/bflib/fhvint.c, src/bflib/fhvint.h
|
|
Interface routines to FHV-factorization were changed to use
|
|
lufint.c routines.
|
|
|
|
* src/glplpf.c, src/glplpf.h
|
|
Routines implementing Schur-complement version of the LP basis
|
|
factorization were changed to use lufint.c routines.
|
|
|
|
* src/glpbfd.c, src/glpbfd.h
|
|
Interface routines to the LP basis factorization were changed
|
|
due to changes in glplpf.c routines.
|
|
|
|
* src/glpluf.c, src/glpluf.c
|
|
Old version of LU-factorization was removed from the package.
|
|
(This old version was used for 10 years since 3.0.6.)
|
|
|
|
* src/misc/triang.c, src/misc/triang.h
|
|
Routine to find maximal triangular part of rectangular matrix
|
|
was added.
|
|
|
|
* src/glpini01.c
|
|
The API routine glp_adv_basis that constructs advanced initial
|
|
LP basis was replaced by an improved version, which (unlike the
|
|
old version) takes into account numerical values of constraint
|
|
coefficients.
|
|
|
|
* src/proxy/*
|
|
Routines that implement the proximity search heuristic for MIP
|
|
were added. Thanks to Giorgio Sartor <0gioker0@gmail.com> for
|
|
contribution.
|
|
|
|
* src/glpk.h
|
|
iocp.ps_heur was added to enable/disable proxy heuristic.
|
|
|
|
* glpsol
|
|
--proxy command-line option was added.
|
|
|
|
* src/zlib/*.*
|
|
zlib general purpose compression library, version 1.2.7,
|
|
was ANSIfied and modified according to GLPK requirements and
|
|
included in the distribution as an external software module.
|
|
This version replaced the old one (1.2.5). For details please
|
|
see src/zlib/README.
|
|
|
|
* src/glpk.h, src/env/time.c
|
|
The API routine glp_time was changed to return double rather
|
|
than glp_long.
|
|
|
|
* src/glplib02.c
|
|
Routines that implement glp_long type (64-bit arithmetic) were
|
|
removed from the package.
|
|
|
|
* src/glpk.h, src/env/alloc.c
|
|
New API routine glp_alloc was added. It makes obsolete two
|
|
API routines glp_malloc and glp_calloc which were replaced by
|
|
macros to use glp_alloc (hence 36:0:0).
|
|
|
|
* src/glpios10.c
|
|
A bug was fixed that caused numerical instability in the FPUMP
|
|
heuristic (the bug was introduced in glpk 4.40).
|
|
|
|
Fri May 24 12:00:00 2013 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.50 (35:0:0) has been released
|
|
|
|
* src/Makefile.am
|
|
Though API was not changed since 4.49, symbols _glp_lpx_* were
|
|
removed from the export list, hence 35:0:0.
|
|
|
|
* src/glpfhv.h, src/glpfhv.c
|
|
Old routines for FHV-factorization were removed.
|
|
|
|
* src/bflib/*.h, src/bflib/*.c
|
|
New version of basis factorization routines, including routines
|
|
for FHV-factorization, were added.
|
|
|
|
* src/glpbfd.c
|
|
LP basis factorization driver was changed according to the new
|
|
routines for FHV-factorization.
|
|
|
|
* doc/glpk.tex
|
|
Some clarifications about using the name index routines were
|
|
added. Thanks to Xypron <xypron.glpk@gmx.de> for suggestion.
|
|
|
|
* doc/gmpl.tex
|
|
Some typos were corrected.
|
|
Thanks to Jeffrey Kantor <Kantor.1@nd.edu> for report.
|
|
|
|
* src/glprlx.c
|
|
A serious bug was *tentatively* fixed. This bug is inherited
|
|
from the original Fortran version of the RELAX-IV code.
|
|
Unfortunately, the code is very intricate, so this bug is still
|
|
under investigation. Thanks to Sylvain Fournier for bug report.
|
|
|
|
RELAX-IV bug details
|
|
--------------------
|
|
In the original RELAX-IV code there are four similar fragments
|
|
in subroutines ascnt1 and ascnt2 like this:
|
|
|
|
C
|
|
C DECREASE THE PRICES OF THE SCANNED NODES BY DELPRC.
|
|
C ADJUST FLOW TO MAINTAIN COMPLEMENTARY SLACKNESS WITH
|
|
C THE PRICES.
|
|
C
|
|
NB = 0
|
|
DO 6 I=1,NSAVE
|
|
. . .
|
|
IF (RC(ARC).EQ.0) THEN
|
|
DELX=DELX+U(ARC)
|
|
NB = NB + 1
|
|
PRDCSR(NB) = ARC
|
|
END IF
|
|
. . .
|
|
|
|
On some instances the variable NB becomes greater than N (the
|
|
number of nodes) that leads to indexing error, because the
|
|
array PRDCSR is declared as array of N elements (more
|
|
precisely, as array of MAXNN elements, however, NB becomes even
|
|
much greater than MAXNN).
|
|
|
|
Tue Apr 16 12:00:00 2013 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.49 (34:0:0) has been released
|
|
|
|
* glprlx.c, glprlx.h
|
|
C version of the Fortran code RELAX-IV (relaxation method of
|
|
Bertsekas and Tseng) was added.
|
|
|
|
* glpapi17.c
|
|
API routine glp_mincost_relax4, which is a driver to RELAX-IV
|
|
code, was added and documented.
|
|
|
|
* glpnet03.c
|
|
API routine glp_netgen_prob (Klingman's standard network
|
|
problems) was added and documented.
|
|
|
|
* glpapi12.c
|
|
A bug (wrong dual feasibility test) was fixed in API routine
|
|
glp_warm_up. Thanks to David T. Price <dtprice@speakeasy.net>
|
|
for bug report.
|
|
|
|
* glpapi10.c
|
|
Obsolete API routine lpx_check_kkt was replaced by API routine
|
|
glp_check_kkt.
|
|
|
|
* glpk.h
|
|
All old API routines whose names begin with 'lpx_' were removed
|
|
from API and no more available.
|
|
|
|
* glpk.tex, graphs.tex
|
|
These documents were essentially reformatted.
|
|
|
|
Mon Jan 28 12:00:00 2013 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.48 (33:0:0) has been released
|
|
|
|
* src/glpmps.c
|
|
A bug in glp_write_mps was fixed. Thanks to Raniere Gaia Costa
|
|
da Silva for bug report.
|
|
|
|
* glpk.h
|
|
glp_prob declaration changed (now it is incomplete struct);
|
|
glp_tree declaration changed (now it is incomplete struct);
|
|
glp_tran declaration changed (now it is incomplete struct);
|
|
glp_long declaration removed;
|
|
glp_time declaration removed;
|
|
glp_difftime removed from API;
|
|
glp_data removed from API;
|
|
glp_sdf_* removed from API;
|
|
glp_mem_usage declaration changed (glp_long -> size_t);
|
|
glp_realloc declaration added (not documented yet).
|
|
|
|
* glpenv.h, glpenv05.c
|
|
Dynamic memory allocation routines were reimplemented.
|
|
|
|
* glpk.h, glpnet03.c
|
|
Routine glp_netgen_prob was added (not documented yet).
|
|
|
|
* configure.ac
|
|
Check for gmp.h was added. Thanks to Heinrich Schuchardt for
|
|
suggestion.
|
|
|
|
* w32/glpk.def, w64/glpk.def
|
|
Changes were made to export only API symbols.
|
|
|
|
Fri Sep 09 12:00:00 2011 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.47 (32:0:32) has been released
|
|
|
|
* src/glpapi20.c
|
|
New API routine glp_infeas1 to solve 0-1 feasibility problem
|
|
was added and documented (see doc/cnfsat.pdf).
|
|
|
|
* src/glpnpp06.c
|
|
Some new preprocessor routines for SAT-CNF encoding, which are
|
|
used by the routine glp_intfeas1, were added.
|
|
|
|
* src/glpnpp.h
|
|
The header was modified due to additions.
|
|
|
|
* src/glpapi21.c
|
|
The glpsol solver was modified to bypass model postprocessing
|
|
if the solution reported is neither optimal nor feasible.
|
|
|
|
* src/glpapi21.c
|
|
New glpsol options (--minisat and --objbnd) were added.
|
|
|
|
* examples/pbn/*.*
|
|
The paint-by-numbers puzzle model (pbn.mod) was modified to
|
|
print solution in PostScript format and to check for multiple
|
|
solutions. Some benchmark examples from <webpbn.com> encoded
|
|
in MathProg were included in the distribution. For more details
|
|
see examples/pbn/README and examples/pbn/pbn.pdf.
|
|
|
|
* examples/Makefile.am
|
|
A minor bug was fixed to correctly build glpk in a separate
|
|
directory. Thanks to Marco Atzeri <marco.atzeri@gmail.com> for
|
|
bug report.
|
|
|
|
Tue Aug 09 12:00:00 2011 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.46 (31:0:31) has been released
|
|
|
|
* src/glpk.h, src/Makefile
|
|
glpk.h was relocated from 'include' to 'src', and 'include'
|
|
subdir was removed; src/Makefile.am was changed appropriately.
|
|
|
|
* src/zlib/*.*
|
|
zlib general purpose compression library, version 1.2.5,
|
|
was ANSIfied and modified according to GLPK requirements and
|
|
included in the distribution as an external software module.
|
|
|
|
For details see src/zlib/README.
|
|
|
|
* src/glpdmx.c
|
|
The following new API routines were added:
|
|
glp_read_cnfsat - read CNF-SAT problem data in DIMACS format
|
|
glp_check_cnfsat - check for CNF-SAT problem instance
|
|
glp_write_cnfsat - write CNF-SAT problem data in DIMACS format
|
|
|
|
* src/minisat/*.*
|
|
MiniSat, a CNF-SAT solver, version 1.14.1, was ANSIfied and
|
|
modified according to GLPK requirements and included in the
|
|
distribution as an external software module.
|
|
|
|
For details see minisat/README and minisat/LICENSE.
|
|
|
|
* src/glpapi19.c
|
|
The API routine glp_minisat1, which is a driver to the MiniSat
|
|
solver, was included in the package.
|
|
|
|
* doc/satcnf.*
|
|
The document "CNF Satisfiability Problem" was included in the
|
|
package. It is a supplement to the GLPK Reference Manual.
|
|
|
|
* src/glpapi20.c
|
|
New glpsol options (--cnf, --wcnf, and --minisat) was added.
|
|
|
|
* glpsql.c
|
|
Some bugs were fixed. Thanks to Xypron <xypron.glpk@gmx.de>.
|
|
|
|
Sun Dec 05 12:00:00 2010 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.45 (30:0:30) has been released
|
|
|
|
* glplpx01.c
|
|
A bug (it_cnt) in routine reset_parms was fixed.
|
|
Thanks to Ali Baharev <ali.baharev@gmail.com> for report.
|
|
|
|
* glpmpl03.c
|
|
A bug (print "text\") was fixed.
|
|
Thanks to Xypron <xypron.glpk@gmx.de> for report.
|
|
|
|
* glpsql.c
|
|
A precision bug was fixed.
|
|
Thanks to Xypron <xypron.glpk@gmx.de>.
|
|
|
|
* glpk.tex
|
|
Some typos were corrected.
|
|
Thanks to Robbie Morrison <robbie@actrix.co.nz>.
|
|
|
|
Thu Jun 03 12:00:00 2010 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.44 (29:0:29) has been released
|
|
|
|
* glpapi14.c glpmpl.h glpmpl01.c glpmpl03.c glpmpl04.c
|
|
Implemented suffixes for variables and constraints.
|
|
|
|
* glpmpl06.c
|
|
Made changes to allow comment records in CSV files.
|
|
|
|
* glpapi17.c
|
|
Added and documented new API routine glp_cpp to solve Critical
|
|
Path Problem.
|
|
|
|
Sat Feb 20 12:00:00 2010 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.43 (28:0:28) has been released
|
|
|
|
* glplib.h, glplib.c, glpenv.h, glpenv.c
|
|
The module glpenv was split into two modules glpenv and glplib.
|
|
|
|
* glpenv01.c, glpenv03.c, glpenv04.c, glpenv06.c
|
|
The following new API routines were added and documented:
|
|
glp_init_env, glp_free_env, glp_open_tee, glp_close_tee,
|
|
glp_error (macro), glp_difftime.
|
|
|
|
* glpapi16.c
|
|
New API routine glp_top_sort (topological sorting of ayclic
|
|
digraph) was added and documented.
|
|
|
|
* glpapi17.c
|
|
A serious bug was fixed in the routine glp_asn_prob_hall.
|
|
|
|
* glpnpp05.c
|
|
A bug was fixed in the LP/MIP preprocessor (hidden covering
|
|
inequalities).
|
|
|
|
* glpsql.c
|
|
Some improvements were made in the table driver (NULL data).
|
|
Thanks to Xypron <xypron.glpk@gmx.de> for contribution.
|
|
|
|
* configure.ac
|
|
Changes were made to use .dylib rather than .so under Mac OS.
|
|
Thanks to Noli Sicad <nsicad@gmail.com> for testing
|
|
|
|
Wed Jan 13 12:00:00 2010 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.42 (27:0:27) has been released
|
|
|
|
* glpapi01.c, glpapi11.c, glpapi12.c, glpdmx.c
|
|
The following new API routines were added and documented:
|
|
glp_check_dup (check for duplicate elements in sparse matrix);
|
|
glp_sort_matrix (sort elements of the constraint matrix);
|
|
glp_read_prob (read problem data in GLPK format);
|
|
glp_write_prob (write problem data in GLPK format);
|
|
glp_analyze_bound (analyze active bound of non-basic variable);
|
|
glp_analyze_coef (analyze obj. coefficient at basic variable);
|
|
glp_print_ranges (print sensitivity analysis report; replaces
|
|
lpx_print_sens_bnds).
|
|
|
|
* glpapi20.c
|
|
New command-line options were added to glpsol:
|
|
--glp (read problem data in GLPK format);
|
|
--wglp (write problem data in GLPK format);
|
|
--lp (replaces --cpxlp);
|
|
--wlp (replaces --wcpxlp);
|
|
--ranges (print sensitivity analysis report).
|
|
|
|
* glpapi06.c
|
|
In the routine glp_init_smcp default value of the parameter
|
|
out_frq was changed to 500 (it was 200).
|
|
|
|
* glpipp.h, glpipp01.c, glpipp02.c
|
|
The old MIP preprocessor module was removed.
|
|
|
|
* glpapi09.c
|
|
Now the MIP solver uses the new MIP preprocessor (NPP).
|
|
|
|
* glplpx03.c
|
|
lpx_write_opb was disabled due to replacing IPP with NPP.
|
|
|
|
* glpnet09.c
|
|
Kellerman's heuristic to cover edges by cliques was added.
|
|
|
|
* glplib08.c
|
|
Recognition of special filenames "/dev/stdin", "/dev/stdout",
|
|
and "/dev/stderr" was added.
|
|
|
|
* glpk.tex
|
|
Chapter "Graph and network routines" was carried out from the
|
|
reference manual as a separate document.
|
|
|
|
Mon Dec 21 12:00:00 2009 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.41 (26:0:26) has been released
|
|
|
|
* glpapi12.c
|
|
The following new API routines were added:
|
|
glp_transform_row (replaces lpx_transform_row);
|
|
glp_transform_col (replaces lpx_transform_col);
|
|
glp_prim_rtest (replaces lpx_prim_ratio_test);
|
|
glp_dual_rtest (replaces lpx_dual_ratio_test).
|
|
Note that values returned by glp_prim_rtest and glp_dual_rtest
|
|
differ from the ones retutned by the deprecated routines.
|
|
|
|
* glpnpp*.*
|
|
The LP/MIP preprocessor was essentially re-implemented.
|
|
|
|
* glpios03.c
|
|
The feature to remove inactive cuts from the active subproblem
|
|
was implemented.
|
|
|
|
* glpios11.c
|
|
The feature processing cuts stored in the cut pool was improved
|
|
(now it uses estimation of objective degradation).
|
|
|
|
* glpscg.*
|
|
Obsolete implemetation of the conflict graph was removed.
|
|
|
|
* glpmpl.h, glpmpl03.c, glpmpl04.c
|
|
FILE was replaced by XFILE to allow using GLPK I/O routines.
|
|
|
|
* glpsql.c, examples/sql, doc/tables.tex
|
|
The SQL table driver was changed to allow multiple arguments
|
|
separated by semicolon in SQL statements. Thanks to Xypron
|
|
<xypron.glpk@gmx.de>.
|
|
|
|
* glpk.h, glpapi14.c
|
|
New API routine glp_time was added (not documented yet).
|
|
|
|
* glpapi20.c
|
|
Two new options were added to glpsol: --seed value (initialize
|
|
pseudo-random number generator used in MathProg model with
|
|
specified seed value), and --ini filename (use as initial basis
|
|
previously saved with -w option).
|
|
|
|
* examples/xyacfs.mod
|
|
Thanks to Nigel Galloway <nigel_galloway@operamail.com> for
|
|
contribution.
|
|
|
|
* examples/dbf/*.*
|
|
Thanks to Noli Sicad <nsicad@gmail.com> for contribution.
|
|
|
|
* w32/*.*, w64/*.*
|
|
Scripts to build GLPK with Microsoft Visual Studio 2010 were
|
|
added. Thanks to Xypron <xypron.glpk@gmx.de> for contribution
|
|
and testing.
|
|
|
|
Tue Nov 03 12:00:00 2009 Andrew Makhorin <mao@gnu.org>
|
|
|
|
* GLPK 4.40 (25:0:25) has been released
|
|
|
|
* glpdmx.c
|
|
Two new API routines were added:
|
|
glp_read_ccdata (read graph in DIMACS clique/coloring format);
|
|
glp_write_ccdata (write graph in DIMACS clique/coloring format).
|
|
Also an example file examples/sample.col was added.
|
|
|
|
* glpapi19.c, glpnet08.c
|
|
New API routine glp_wclique_exact was added. It is intended to
|
|
find a maximum weight clique with the exact algorithm developed
|
|
by Prof. P. Ostergard.
|
|
|
|
* glpnpp02.c
|
|
A bug was fixed in the LP preprocessor (routine npp_empty_col).
|
|
Thanks to Stefan Vigerske <stefan@math.hu-berlin.de> for the
|
|
bug report.
|
|
|
|
* glpios10.c
|
|
A bug was fixed and some improvements were made in the FPUMP
|
|
heuristic module. Thanks to Xypron <xypron.glpk@gmx.de>.
|
|
|
|
* glpapi12.c
|
|
A bug was fixed in the API routine glp_warm_up (dual
|
|
feasibility test was incorrect in maximization case). Thanks to
|
|
Uday Venkatadri <Uday.Venkatadri@dal.ca> for the bug report.
|
|
|
|
* glpapi16.c
|
|
Two new API routines were added:
|
|
glp_del_vertices (remove vertices from graph);
|
|
glp_del_arc (remove arc from graph).
|
|
|
|
* glpios09.c
|
|
The hybrid pseudocost branching heuristic was included in the
|
|
MIP solver. It is available on API level (iocp.br_tech should
|
|
be set to GLP_BR_PCH) and in the stand-alone solver glpsol
|
|
(via the command-line option --pcost). This heuristic may be
|
|
useful on solving hard MIP instances.
|
|
|
|
* glpios03.c
|
|
The branching heuristic by Driebeck and Tomlin (used in the
|
|
MIP solver by default) was changed to switch to branching on
|
|
most fractional variable if an lower bound of degradation of
|
|
the objective is close to zero for all branching candidates.
|
|
|
|
Sun Jul 26 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.39 (24:0:24) has been released
|
|
|
|
* glpsdf.c
|
|
New API routines to read plain data files were added.
|
|
|
|
* glpcpx.h, glpini.h, glpscl.h
|
|
These headers were removed.
|
|
|
|
* glpcpx.c
|
|
API routines glp_read_lp and glp_write_lp to read/write files
|
|
in CPLEX LP format were re-implemented. Now glp_write_lp
|
|
correctly writes double-bounded (ranged) rows by introducing
|
|
slack variables rather than by duplicating the rows. The data
|
|
structure glp_cpxcp and routine glp_init_cpxcp were added.
|
|
|
|
* amd/*
|
|
The 'xfree(NULL)' bug was fixed in the AMD routines. Thanks to
|
|
Niels Klitgord <niels@bu.edu> for the bug report.
|
|
|
|
* glpapi16.c
|
|
New API routines glp_set_vertex_name, glp_create_v_index,
|
|
glp_find_vertex, and glp_delete_v_index were added.
|
|
|
|
* glpdmx.c
|
|
New API routines glp_read_asnprob, glp_write_asnprob,
|
|
glp_read_ccformat, and glp_write_ccformat were added (the two
|
|
latter routines are not documented yet).
|
|
|
|
* glpapi18.c
|
|
New API routines glp_check_asnprob, glp_asnprob_lp,
|
|
glp_asnprob_okalg, and glp_asnprob_hall were added.
|
|
|
|
* glpini01.c, glpini02.c
|
|
The message "Crashing..." was changed to "Constructing initial
|
|
basis..." due to suggestion by Thomas Kahle <tom111@gmx.de>.
|
|
|
|
* glpapi14.c
|
|
New API routines glp_printf, glp_vprintf, glp_malloc,
|
|
glp_calloc, glp_free, and glp_assert were added.
|
|
|
|
* glplpp.h, glplpp01.c, glplpp02.c
|
|
Old LP presolver routines were removed. Now glp_simplex uses
|
|
new preprocessing routines (see glpnpp).
|
|
|
|
* glpapi12.c
|
|
New API routine glp_warm_up was added; it replaces the routine
|
|
lpx_warm_up.
|
|
|
|
Sat May 02 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.38 (23:0:23) has been released
|
|
|
|
* glpmps.c
|
|
API routines to read/write MPS files were re-implemented.
|
|
|
|
* glpspx02.c
|
|
Some improvements were made in the dual simplex routine.
|
|
|
|
* glpk.h
|
|
New structure glp_iptcp was added.
|
|
|
|
* glpnpp.h, glpnpp01.c, glpnpp02.c
|
|
New LP/MIP preprocessor. Currently it includes only some basic
|
|
routines and used only in the interior-point solver.
|
|
|
|
* glpapi08.c
|
|
API routine glp_interior was replaced by an improved version
|
|
(new LP/MIP preprocessor, new ordering algorithms).
|
|
|
|
New API routine glp_init_iptcp was added.
|
|
|
|
API routine glp_ipt_status may return two new statuses due to
|
|
changes in glp_interior.
|
|
|
|
* glpsol.c
|
|
New command-line options were added (ordering algorithm used in
|
|
the interior-point solver).
|
|
|
|
* amd/*.*, colamd/*.*
|
|
Two external software modules AMD and COLAMD/SYMAMD used in the
|
|
interior-point solver were included in the distribution.
|
|
|
|
For details see amd/README and colamd/README.
|
|
|
|
* glpnet03.c, glpnet04.c, glpnet05.c
|
|
A minor bug was fixed (_G => G_). Thanks to Nelson H. F. Beebe
|
|
<beebe@math.utah.edu> for bug report.
|
|
|
|
Sun Mar 29 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.37 (22:0:22) has been released
|
|
|
|
* glpk.h
|
|
iocp.fp_heur was added to enable/disable fpump heuristic.
|
|
|
|
* glpios10.c
|
|
ios_feas_pump was added (feasibility pump heuristic).
|
|
|
|
* glpsol.c
|
|
--fpump command-line option was added.
|
|
|
|
* glpsds.c
|
|
Plain data set routines were added to facilitate reading plain
|
|
data in application programs. Currently these routines are not
|
|
in API, though declared in glpk.h.
|
|
|
|
* glpapi08.c
|
|
A bug was fixed in the internal routine restore. (Due to this
|
|
bug dual solution components were computed incorrectly if the
|
|
problem was scaled.)
|
|
|
|
* glpapi10.c, glpapi11.c
|
|
The following new API routines were added:
|
|
glp_print_sol (replaces lpx_print_sol);
|
|
glp_print_ipt (replaces lpx_print_ips);
|
|
glp_print_mip (replaces lpx_print_mip);
|
|
_glp_check_kkt (replaces lpx_check_kkt, lpx_check_int).
|
|
Now the routine lpx_print_prob (deprecated) is equivalent to
|
|
the routine glp_write_lp.
|
|
|
|
* glpapi18.c, glpapi19.c
|
|
The following new API routines were added:
|
|
glp_read_graph (read graph from plain text file);
|
|
glp_write_graph (write graph to plain text file);
|
|
glp_weak_comp (find all weakly connected components);
|
|
glp_strong_comp (find all strongly connected components).
|
|
|
|
* configure.ac, Makefile.am
|
|
Changes were made: (a) to allow using autoreconf/autoheader;
|
|
(b) to allow building glpk in a directory other than its source
|
|
directory. Thanks to Marco Atzeri <marco_atzeri@yahoo.it> for
|
|
bug report.
|
|
|
|
* examples/shiftcover.mod
|
|
An example model in MathProg was added.
|
|
Thanks to Larry D'Agostino <Larry.D'Agostino@gmacrescap.com>
|
|
for contribution.
|
|
|
|
Fri Feb 06 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.36 (21:0:21) has been released
|
|
|
|
* glpnet06.c, glpnet07.c, glpapi19.c
|
|
The following new API routines were added:
|
|
glp_mincost_okalg find minimum-cost flow with out-of-kilter
|
|
algorithm
|
|
glp_maxflow_ffalg find maximal flow with Ford-Fulkerson
|
|
algorithm
|
|
|
|
* glpsol.c
|
|
Two new command-line options were added:
|
|
--mincost read min-cost flow data in DIMACS format
|
|
--maxflow read maximum flow data in DIMACS format
|
|
|
|
* doc/glpk.*
|
|
New edition of the reference manual was included.
|
|
|
|
* glpk.h
|
|
Duplicate symbols were removed to allow using swig.
|
|
Thanks to Kelly Westbrooks <kellywestbrooks@yahoo.com> and
|
|
Nigel Galloway <nigel_galloway@operamail.com> for suggestion.
|
|
|
|
* glpcpx.c
|
|
A minor defect was fixed in the routine glp_write_lp.
|
|
Thanks to Sebastien Briais <sbriais@free.fr> for bug report.
|
|
|
|
* glpsql.c
|
|
A minor bug was fixed. Thanks to Xypron <xypron.glpk@gmx.de>
|
|
for patch.
|
|
|
|
* examples/hashi.mod, examples/shikaku.mod
|
|
Two example models in MathProg were added. Thanks to Sebastian
|
|
Nowozin <nowozin@gmail.com> for contribution.
|
|
|
|
* examples/qfit.mod, examples/yacfs.mod
|
|
Two example models in MathProg were added. Thanks to Nigel
|
|
Galloway <nigel_galloway@operamail.com> for contribution.
|
|
|
|
Fri Jan 09 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.35 (20:0:20) has been released
|
|
|
|
* glpk.h, glpapi.c, glpnet.c
|
|
The following new API routines were added:
|
|
glp_create_graph create graph
|
|
glp_set_graph_name assign (change) graph name
|
|
glp_add_vertices add new vertices to graph
|
|
glp_add_arc add new arc to graph
|
|
glp_erase_graph erase graph content
|
|
glp_delete_graph delete graph
|
|
glp_read_mincost read minimum cost flow problem data in
|
|
DIMACS format
|
|
glp_write_mincost write minimum cost flow problem data in
|
|
DIMACS format
|
|
glp_mincost_lp convert minimum cost flow problem to LP
|
|
glp_netgen Klingman's network problem generator
|
|
glp_gridgen grid-like network problem generator
|
|
glp_read_maxflow read maximum flow problem data in DIMACS
|
|
format
|
|
glp_write_maxflow write maximum flow problem data in DIMACS
|
|
format
|
|
glp_maxflow_lp convert maximum flow problem to LP
|
|
glp_rmfgen Goldfarb's maximum flow problem generator
|
|
|
|
* doc/glpk.*
|
|
New edition of the reference manual was included.
|
|
|
|
* examples/sample.min, examples/sample.max
|
|
Two example data files in DIMACS format were added.
|
|
|
|
* glplib04.c
|
|
The statement "if (c = '\n') fflush(stdout)" was added to the
|
|
internal routine xputc to provide "real-time" terminal output.
|
|
Thanks to Luiz Bettoni <bettoni@cpgei.ct.utfpr.edu.br> for
|
|
suggestion.
|
|
|
|
* glpmpl05.c
|
|
A minor bug was fixed in the internal routine mpl_fn_time2str.
|
|
Thanks to Stefan Vigerske <stefan@vigerske.de> for bug report.
|
|
|
|
* w32/makefile, w64/makefile
|
|
The flag -O2 (/O2) was added to some makefiles.
|
|
|
|
Thu Dec 04 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.34 (19:0:19) has been released
|
|
|
|
* src/glpios03.c
|
|
A bug was fixed in the internal routine branch_on. Thanks to
|
|
Nigel Galloway <nigel_galloway@operamail.com> for bug report.
|
|
|
|
* src/glpmpl05.c
|
|
Three new MathProg functions were included:
|
|
gmtime obtaining current calendar time
|
|
str2time converting character string to calendar time
|
|
time2str converting calendar time to character string
|
|
Thanks to Xypron <xypron.glpk@gmx.de>.
|
|
|
|
* doc/glpk.*, doc/gmpl.*
|
|
A new edition of the GLPK reference manual and GNU MathProg
|
|
language description were included.
|
|
|
|
Thu Oct 30 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.33 (18:0:18) has been released
|
|
|
|
* glpapi*.*
|
|
The following new API routines were added:
|
|
glp_copy_prob copy problem object content
|
|
glp_exact solve LP in exact arithmetic
|
|
(makes lpx_exact deprecated)
|
|
glp_get_unbnd_ray determine variable causing unboundedness
|
|
(makes lpx_get_ray_info deprecated)
|
|
glp_interior solve LP with interior-point method
|
|
(makes lpx_interior deprecated)
|
|
|
|
* glpapi*.*
|
|
The following new API routines for processing models written in
|
|
the GNU Mathprog language were added to the package:
|
|
glp_mpl_alloc_wksp allocate the translator workspace
|
|
glp_mpl_read_model read and translate model section
|
|
glp_mpl_read_data read and translate data section
|
|
glp_mpl_generate generate the model
|
|
glp_mpl_build_prob build LP/MIP instance from the model
|
|
glp_mpl_postsolve postsolve the model
|
|
glp_mpl_free_wksp deallocate the translator workspace
|
|
(These routines make lpx_read_model deprecated.)
|
|
|
|
* src/glpapi17.c, examples/glpsol.c
|
|
The stand-alone solver glpsol was re-implemented with new API
|
|
routines.
|
|
|
|
* src/glpsql.c
|
|
Some bugs were fixed in the SQL table driver. Thanks to Xypron
|
|
<xypron.glpk@gmx.de>.
|
|
|
|
* examples/cplex/*.*
|
|
A crude implementation of CPLEX-like interface to GLPK API was
|
|
added to the package. See examples/cplex/README.
|
|
|
|
Fri Oct 03 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.32 (17:0:17) has been released
|
|
|
|
* glpmpl01.c
|
|
A bug was fixed. Due to this bug iterated expressions having
|
|
an indexing expression whose dummy indices are bound to some
|
|
values, i.e. like sum{(i+1,j,k-1) in E} x[i,j,k] are evaluated
|
|
incorrectly. Namely, current value of such expressions is not
|
|
invalidated when corresponding dummy indices (like i and k in
|
|
the example above) are changed, that erroneously results in the
|
|
same value evaluated for the first time.
|
|
|
|
* glpios03.c
|
|
Euclidean reduction of the local objective bound was added in
|
|
the routine glpios03.c.
|
|
|
|
* glpapi11.c
|
|
The following new branch-and-cut API routines were added:
|
|
glp_ios_row_attr determine additional row attributes;
|
|
glp_ios_pool_size determine current size of the cut pool;
|
|
glp_ios_add_row add constraint to the cut pool;
|
|
glp_ios_del_row delete constraint from the cut pool;
|
|
glp_ios_clear_pool delete all constraints from the cut pool.
|
|
|
|
* glpapi08.c
|
|
The following new features were included in the branch-and-cut
|
|
solver (the API routine glp_intopt):
|
|
MIP presolver;
|
|
mixed cover cut generator;
|
|
clique cut generator.
|
|
Due to the MIP presolver glp_intopt may additionally return
|
|
GLP_ENOPFS and GLP_ENODFS, if primal or dual infeasibility of
|
|
LP relaxation is detected by the presolver. Also the return
|
|
code GLP_EMIPGAP was introduced to correctly indicate that the
|
|
mip gap tolerance is reached.
|
|
|
|
* glplpx01.c
|
|
Now the obsolete API routines lpx_integer and lpx_intopt are
|
|
completely superseded by the API routine glp_intopt that makes
|
|
them deprecated.
|
|
|
|
* glpmpl05.c
|
|
Now the table driver name "iODBC" can be specified as "ODBC".
|
|
|
|
* glpmpl03.c
|
|
A bug fixed in the routine free_dca.
|
|
Thanks to Xypron <xypron.glpk@gmx.de>.
|
|
|
|
* glpsql.c
|
|
A bug was fixed in the SQL table driver.
|
|
Thanks to Xypron <xypron.glpk@gmx.de>.
|
|
|
|
* examples/glpsol.c
|
|
Changes were made to allow multiple MathProg data files.
|
|
|
|
* doc/glpk.*
|
|
A new edition of the GLPK reference manual was included.
|
|
|
|
* doc/tables.*
|
|
A new edition of the supplement "Using data tables in the GNU
|
|
MathProg language" was included.
|
|
|
|
Tue Sep 02 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.31 (16:0:16) has been released
|
|
|
|
* glpspx.h, glpspx01.c, glpspx02.c, glpapi06.c
|
|
The dual simplex solver (spx_dual_opt) was replaced by a new
|
|
implementation of the two-phase dual simplex method (spx_dual).
|
|
Old simplex method routines (spx_prim_opt, spx_prim_feas, and
|
|
spx_dual_opt) were removed from the package.
|
|
|
|
* glpk.h, glpscl.h, glpscl.c, glpapi04.c
|
|
New API routine glp_scale_prob was added. It replaces routine
|
|
lpx_scale_prob which is deprecated.
|
|
|
|
* glpk.h, glpini.h, glpini01.c, glpini02.c, glpapi05.c
|
|
New API routines glp_std_basis, glp_adv_basis, glp_cpx_basis
|
|
were added. They replace routines lpx_std_basis, lpx_adv_basis,
|
|
lpx_cpx_basis which are deprecated.
|
|
|
|
* glpdmp.c
|
|
8-byte data alignment was added to the module (sufficient for
|
|
both ILP32 and LP64 environments).
|
|
|
|
* glplib07.c
|
|
16-byte data alignment was added to the module to provide
|
|
compatibility with LP64 environment (8-byte is not sufficient
|
|
due to jmp_buf; thanks to Xypron for investigation).
|
|
|
|
* glplpx16.c
|
|
New version of the routine lpx_write_pb was added. Thanks to
|
|
Oscar Gustafsson <oscarg@isy.liu.se> for the contribution.
|
|
|
|
* w32/VC9, w64/VC9
|
|
Makefiles and batch files were added to build GLPK under 32-
|
|
and 64-bit Windows with Microsoft Visual Studio Express 2008.
|
|
Thanks to Heinrich Schuchardt <heinrich.schuchardt@gmx.de> for
|
|
the contribution and testing.
|
|
|
|
* w32/DM, w32/OWC
|
|
Makefiles and batch files were added to build GLPK with Digital
|
|
Mars C/C++ 8.50 and Open Watcom C/C++ 1.6 (32-bit Windows).
|
|
|
|
Wed Aug 13 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.30 (15:0:15) has been released
|
|
|
|
* glpspx.h, glpspx03.c, glpapi06.c
|
|
The primal simplex solver (spx_prim_opt, spx_prim_feas) was
|
|
replaced by a new implementation (spx_primal), which currently
|
|
provides the same features as the old version.
|
|
|
|
* glpmpl01.c, glpmpl03.c
|
|
Some changes were made in the MathProg translator to allow <,
|
|
<=, >=, and > on comparing symbolic values. Thanks to Heinrich
|
|
Schuchardt <heinrich.schuchardt@gmx.de> for patches.
|
|
|
|
* glplpx10.c
|
|
Internal routine set_d_eps in the exact LP solver was changed
|
|
to prevent approximation errors in case of integral data.
|
|
Thanks to Markus Pilz <pilz@cs.uni-bonn.de> for bug report.
|
|
|
|
XXX XXX XX 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.29 (14:0:14) has been released
|
|
|
|
* configure.ac
|
|
The configure script was changed to disable optional features
|
|
by default. For details see file INSTALL.
|
|
|
|
* glpipp02.c
|
|
A bug was fixed in the internal routine reduce_bounds. Thanks
|
|
to Anne-Laurence Putz <anne-laurence.putz@eurodecision.com> for
|
|
the bug report.
|
|
|
|
* glpapi01.c
|
|
New API routine glp_erase_prob was added.
|
|
|
|
* glpapi13.c
|
|
New API routines glp_read_mps and glp_write_mps were added.
|
|
They replace API routines lpx_read_mps, lpx_read_freemps,
|
|
lpx_write_mps, and lpx_write_freemps, which are deprecated.
|
|
|
|
* glpapi14.c
|
|
New API routines glp_read_lp and glp_write_lp were added. They
|
|
replace API routines lpx_read_cpxlp and lpx_write_cpxlp, which
|
|
are deprecated.
|
|
|
|
* glpsql.c
|
|
Minor bug was fixed. Thanks to Xypron <xypron.glpk@gmx.de> for
|
|
the bug report.
|
|
|
|
Tue Mar 25 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.28 (13:0:13) has been released
|
|
|
|
* glplib.h, glplib.c
|
|
Three wrapper routines xdlopen, xdlsym, and xdlclose, which
|
|
provide the shared library support, were added. A particular
|
|
version of these routines depends on the option --enable-dl
|
|
passed to the configure script (see file INSTALL for details).
|
|
Thanks to Rafael Laboissiere <rafael@debian.org> for useful
|
|
advices concerning the shared library support.
|
|
|
|
* glpsql.c
|
|
A static linking to iODBC and MySQL libraries used in the
|
|
MathProg table drivers was replaced by a dynamic linking to
|
|
corresponding shared libraries.
|
|
Many thanks to Heinrich Schuchardt <heinrich.schuchardt@gmx.de>
|
|
for the contribution and to Vijay Patil <vijay.patil@gmail.com>
|
|
for testing this feature under Windows XP.
|
|
|
|
* glpgmp.h, glpgmp.c
|
|
A bug (which appeared only on 64-bit platforms) was fixed.
|
|
Thanks to Axel Simon <Axel.Simon@ens.fr> for the bug report.
|
|
|
|
* glpapi.c
|
|
A bug was fixed in the api routine glp_add_cols. (If the basis
|
|
is valid, adding column keeps it valid, however, col->bind was
|
|
set to -1 rather to 0.)
|
|
Thanks to Cedric[FR] <fox2113@wanadoo.fr> for the bug report.
|
|
|
|
* glplib.c
|
|
64-bit unsigned int type glp_ulong and corresponding routines
|
|
were replaced by 64-bit signed int type xlong_t.
|
|
|
|
* glpk.h, glpapi.c
|
|
The type glp_ulong was replaced by glp_long. This affects only
|
|
the api routine glp_mem_usage.
|
|
|
|
* glplib.c
|
|
Compressed data file support was added. This feature requires
|
|
the zlib data compression libraries and allows compressing and
|
|
decompressing .gz files "on the fly".
|
|
|
|
* glpcli.h, glpcli.c
|
|
Command-line interface routines were added. (This feature is
|
|
incomplete so far.)
|
|
|
|
Sun Mar 02 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.27 (12:0:12) has been released
|
|
|
|
* glpsql.h, glpsql.c
|
|
Two MathProg table drivers for iODBC and MySQL contributed by
|
|
Heinrich Schuchardt <heinrich.schuchardt@gmx.de> were added to
|
|
the package.
|
|
|
|
* glpmpl05.c
|
|
Mathprog table driver for xBASE was added to the package.
|
|
|
|
* glpmpl03.c
|
|
A minor was fixed in the MathProg translator (if some field
|
|
specified in the table statement is missing in corresponding
|
|
input table, the bug causes abnormal termination). Thanks to
|
|
Heinrich Schuchardt <heinrich.schuchardt@gmx.de> for the bug
|
|
report.
|
|
|
|
* glpmpl.h, glpmpl.c
|
|
STRING data type was replaced by plain character strings.
|
|
|
|
Sun Feb 17 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.26 (11:0:11) has been released
|
|
|
|
* glpmpl.h, glpmpl01.c, glpmpl03.c, glpmpl05.c
|
|
The table statement was implemented. Description of this new
|
|
feature is given in file doc/tables.txt.
|
|
|
|
* glpios03.c
|
|
A bug causing zero divide error on computing euclidean norm of
|
|
the cut coefficient vector was fixed.
|
|
|
|
Wed Dec 19 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.25 (10:0:10) has been released
|
|
|
|
* glpapi10.c
|
|
Routines lpx_eval_tab_row and lpx_eval_tab_col were replaced by
|
|
glp_eval_tab_row and glp_eval_tab_col.
|
|
|
|
* glpios03.c, glpios05.c
|
|
Gomory's mixed integer cuts were implemented.
|
|
|
|
* glpscs.h, glpscs.c
|
|
Segmented character string routines are no longer used and were
|
|
removed from the package.
|
|
|
|
Wed Nov 21 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.24 (9:0:9) has been released
|
|
|
|
* src/glplpx16.c
|
|
A bug was fixed in the routine lpx_write_cpxlp. If a variable
|
|
x has upper bound and no lower bound, it should appear in the
|
|
bounds section as "-inf <= x <= u", not as "x <= u". Thanks to
|
|
Enric Rodriguez <erodri@lsi.upc.edu> for the bug report.
|
|
|
|
* src/glpios03.c, src/glpios04.c, src/glpios05.c
|
|
MIR (mixed integer rounding) cuts were implemented.
|
|
|
|
Sun Oct 28 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.23 (8:0:8) has been released
|
|
|
|
* src/glplib05.c, configure.ac
|
|
Check for vsnprintf was added.
|
|
|
|
* include/glppds.h, src/glppds.c
|
|
A module to scan plain data was added.
|
|
|
|
* src/glpapi09.c
|
|
The following new API routines were added:
|
|
glp_read_sol read basic solution from text file;
|
|
glp_write_sol write basic solution to text file;
|
|
glp_read_ipt read interior-point solution from text file;
|
|
glp_write_ipt write interior-point solution to text file;
|
|
glp_read_mip read MIP solution from text file;
|
|
glp_write_mip write MIP solution to text file.
|
|
|
|
* src/glpapi12.c
|
|
Advanced API routine glp_free_env was added.
|
|
|
|
* examples/glpsol.c
|
|
The following three command-line options were added:
|
|
--mipgap tol set relative MIP gap tolerance
|
|
-r filename read solution from filename
|
|
-w filename write solution to filename
|
|
|
|
Wed Sep 19 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.22 (7:0:7) has been released
|
|
|
|
* src/glpios02.c
|
|
A bug was fixed in the MIP preprocessor (ios_preprocess_node).
|
|
Thanks to Roberto Bagnara <bagnara@cs.unipr.it> (Department of
|
|
Mathematics, University of Parma, Italy) for the bug report.
|
|
|
|
* src/glpios02.c
|
|
A bug was fixed in the MIP preprocessor (col_implied_bounds),
|
|
due to which constraint coefficients with small magnitude could
|
|
lead to wrong implied bounds of structural variables.
|
|
|
|
* src/glpipp02.c
|
|
A similar bug was fixed in the routine reduce_bounds.
|
|
|
|
* src/glpapi01.c
|
|
A bug was fixed in the routines glp_set_mat_row and
|
|
glp_set_mat_col. (The bug appeared due to incorrect removing
|
|
zero elements from the row/column lists.)
|
|
|
|
* src/glplpx14.c
|
|
A bug was fixed in the API routines lpx_read_mps and
|
|
lpx_read_freemps, due to which bounds of type LI specified in
|
|
BOUNDS section were incorrectly processed.
|
|
|
|
* src/glplib05.c
|
|
A call to standard function vsprintf was replaced by a call to
|
|
vsnprintf for security reasons. Many thanks to Peter T. Breuer
|
|
<ptb@inv.it.uc3m.es> and Rafael Laboissiere <rafael@debian.org>.
|
|
|
|
Tue Aug 28 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.21 (6:0:6) has been released
|
|
|
|
* glpscg.h, glpscg.c
|
|
Routines to maintain sparse cliqued graph were added.
|
|
|
|
* glpios02.c
|
|
MIP preprocessing routines were added.
|
|
|
|
* glpk.h, glpios.h, glpios03.c
|
|
New reasons for calling the callback routine were introduced
|
|
in the MIP solver.
|
|
|
|
* glpapi08.c
|
|
Default backtracking strategy was changed to best local bound.
|
|
|
|
* glpapi11.c
|
|
New API routine glp_term_out to enable/disable terminal output
|
|
was added.
|
|
|
|
* glprng.h, glprng02.c
|
|
Two routines to generate uniformly distributed pseudo-random
|
|
floating-point numbers were added.
|
|
|
|
Thu Jul 26 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.20 (5:0:5) has been released
|
|
|
|
* glpk.h, glpapi08.c
|
|
The routine lpx_integer was replaced by an equivalent routine
|
|
glp_intopt. Also new API routine glp_init_iocp was added.
|
|
|
|
* glpiet.h, glpiet.c
|
|
Routines implementing the implicit enumeration tree are
|
|
no longer used and therefore were removed from the package.
|
|
|
|
* glpios.h, glpios01.c, glpios02, glpios03
|
|
Routines implementing the integer optimization suite being
|
|
replaced by a new version were removed from the package.
|
|
|
|
* glpmip.h, glpmip01.c, glpmip02.c
|
|
|
|
Routines implementing the B&B method being replaced by a new
|
|
version were removed from the package.
|
|
|
|
* glpios.h, glpios01.c, glpios02.c
|
|
|
|
Routines implementing a new version of the integer optimization
|
|
suite (IOS) based on the B&B method were added to the package.
|
|
|
|
* glpk.h, glpapi10.c
|
|
Branch-and-bound interface routines were added to the package.
|
|
|
|
* examples/tspsol.c
|
|
The TSP solver based on old version of the integer optimization
|
|
suite is no more supported and was removed from the package.
|
|
|
|
* glpipp02.c
|
|
An error in the routine reduce_bounds was fixed; thanks to
|
|
Graham Rockwell <bionomicron@gmail.com> for the bug report.
|
|
|
|
* glpk.latex
|
|
A new edition of the reference manual was included.
|
|
|
|
Thu Jul 05 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.19 (4:0:4) has been released
|
|
|
|
The principal change is upgrading to GPLv3.
|
|
|
|
* glpapi01.c
|
|
A serious bug in the routine glp_del_cols was fixed; thanks to
|
|
Cedric[FR] <fox2113@wanadoo.fr> for the bug report. The bug
|
|
appeared because on deleting non-basic columns the basis header
|
|
remained valid, however, contained invalid (old) column ordinal
|
|
numbers.
|
|
|
|
* glpapi10.c
|
|
A new advanced API routine glp_mem_limit was added.
|
|
|
|
* glplpx01.c
|
|
The case GLP_EBOUND was added to the routine lpx_simplex.
|
|
Thanks to Cameron Kellough <Cameron.Kellough@sri.com> for the
|
|
bug report.
|
|
|
|
* glplpx19.c
|
|
An API routine lpx_write_pb to write the problem instance in
|
|
OPB (pseudo boolean) format format was added. Thanks to Oscar
|
|
Gustafsson <oscarg@isy.liu.se> for the contribution.
|
|
|
|
* glpsol.c
|
|
Two new options --wpb and --wnpb were added to glpsol to write
|
|
the problem instance in OPB format.
|
|
|
|
Mon Jun 25 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.18 (3:0:3) has been released
|
|
|
|
* glplib.h
|
|
Type names ulong_t and uldiv_t were changed to glp_ulong and
|
|
glp_uldiv to avoid conflicts with standard type names on some
|
|
platforms. Thanks to Boris Wirtz <Boris.Wirtz@uni-oldenburg.de>
|
|
for the bug report.
|
|
|
|
* glpbfd.*, glpfhv.*, glplpf.*
|
|
LP basis factorization routines were made tidy.
|
|
|
|
* glpk.h, glpapi04.c
|
|
The following API routines were added:
|
|
glp_set_rii, glp_set_sjj, glp_get_rii, glp_get_sjj.
|
|
|
|
* glpk.h, glpapi06.c
|
|
The routine lpx_simplex was replaced by an equivalent routine
|
|
glp_simplex. Also new API routine glp_init_smcp was added.
|
|
|
|
* glpk.h, glpapi09.c
|
|
The following advanced API routines were added:
|
|
glp_bf_exists, glp_factorize, glp_bf_updated, glp_get_bfcp,
|
|
glp_set_bfcp, glp_get_bhead, glp_get_row_bind, glp_get_col_bind,
|
|
glp_ftran, glp_btran.
|
|
|
|
* glpk.latex
|
|
A new edition of the reference manual was included.
|
|
|
|
* examples/dea.mod, examples/food.mod, examples/food2.mod
|
|
Three examples in the MathProg language were added.
|
|
Thanks to Sebastian Nowozin <nowozin@gmail.com>.
|
|
|
|
Sat May 26 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.17 (2:0:2) has been released
|
|
|
|
* glpdmp.h, glpdmp.c
|
|
Memory pool routines were replaced by a new version.
|
|
|
|
* glpscs.h, glpscs.c
|
|
Segmented string routines were replaced by a new version.
|
|
|
|
* glplpx08.c, glplpx09.c
|
|
Now the MIP problem may have no integer columns.
|
|
|
|
* glpapi01.c
|
|
The routines glp_set_mat_row, glp_set_mat_col, and glp_load_mat
|
|
were modified to allow zero elements (which are not stored in
|
|
the constraint matrix).
|
|
|
|
* glpscf.h, glpscf.c
|
|
Schur complement factorization routines were implemented.
|
|
|
|
* glplpf.h, glplpf.c
|
|
LP basis factorization routines based on LU-factorization and
|
|
Schur complement were implemented.
|
|
|
|
* glplpx02.c, glplpx03.c
|
|
New control parameter LPX_K_BFTYPE was introduced to choose the
|
|
basis factorization type used by the simplex method routines.
|
|
|
|
* glpsol.c
|
|
Three new command-line options were added to choose the basis
|
|
factorization type used by the simplex method routines: --luf,
|
|
--cbg, and --cgr.
|
|
|
|
* glpk.latex
|
|
A new edition of the reference manual was included.
|
|
|
|
Sat May 05 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.16 (1:0:1) has been released
|
|
|
|
* glpk.h, glpapi.c, glplpx01.c, glplpx02.c
|
|
Names of a number basic api routines were changed and now have
|
|
the prefix 'glp_'. To keep backward compatibility these routines
|
|
are also available via their old names prefixed with 'lpx_'.
|
|
|
|
* glplpx19.c
|
|
Three new api routines were added: glp_version, glp_term_hook,
|
|
and glp_mem_usage.
|
|
|
|
* glpk.latex, gmpl.texi
|
|
A new edition of the reference manuals was included.
|
|
|
|
* lpglpk40.c
|
|
This example program is no longer supported and therefore was
|
|
removed from the package.
|
|
|
|
Sun Feb 18 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.15 (0:0:0) has been released
|
|
|
|
* configure.ac, Makefile.am
|
|
Autotools specification files were changed to use GNU Libtool
|
|
that allows building the static as well as shared GLPK library.
|
|
Thanks to Rafael Laboissiere <rafael@debian.org>.
|
|
|
|
Mon Feb 05 08:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.14 has been released
|
|
Now GLPK conforms to ILP32, LLP64, and LP64 programming models
|
|
(the latter seems to be the ultimate choice regarding 64-bit
|
|
architectures). Note that GLPK itself is a 32-bit application,
|
|
and the conformity only means that the package works correctly
|
|
on all these arenae. Nevertheless, on 64-bit platforms it is
|
|
possible to use more than 4GB of memory, if necessary.
|
|
|
|
* Makefile
|
|
Starting from this release only the header glpk.h is needed to
|
|
be installed.
|
|
|
|
* glplib01.c
|
|
Two routines bigmul and bigdiv which performs multiplication
|
|
and division of unsigned integers of arbitrary precision were
|
|
added.
|
|
|
|
* glplib02.c
|
|
A set of 64-bit arithmetic routines were added.
|
|
|
|
* glplib04.c
|
|
Some low-level library routines were improved and renamed.
|
|
|
|
* glpcfg.h
|
|
The macro GLP_TM_SPEC were introduced to specify a version of
|
|
the time routine depending on the host environment.
|
|
|
|
Mon Nov 13 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.13 has been released
|
|
|
|
* configure.in
|
|
'-lm' bug was fixed.
|
|
|
|
* glpbfx.h, glpbfx.c
|
|
Basis factorization interface routines based on exact (bignum)
|
|
arithmetic were implemented.
|
|
|
|
* glpssx.h, glpssx1.c, glpssx2.c
|
|
Simplex method routines based on exact (bignum) arithmetic were
|
|
implemented.
|
|
|
|
* glplpx6e.c
|
|
The routine lpx_exact, which is an easy-to-use driver to the
|
|
exact simplex method, was added.
|
|
|
|
* glpsol.c
|
|
Two command-line options were added: '--exact' and '--xcheck'.
|
|
|
|
Wed Nov 08 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.12 has been released
|
|
|
|
* glpcfg.h
|
|
The package configuration file was added.
|
|
|
|
* glplib2.c
|
|
Alternative version of the routines umalloc, ucalloc, and ufree
|
|
was provided. It does not limit the amount of allocated memory
|
|
to INT_MAX bytes and therefore can be used on platforms where
|
|
sizeof(void *) > sizeof(int). To enable this version one should
|
|
define the preprocessor variable GLP_HUGE_MEM.
|
|
|
|
* glprng.c
|
|
The routine rng_create_rand was changed to initialize the
|
|
generator using seed = 1, not 0, to conform ISO C requirements.
|
|
|
|
* glpgmp.h, glpgmp.c
|
|
A set of bignum arithmetic routines implementing operations on
|
|
integers and rationals was added. These routines are compatible
|
|
with the GNU MP library.
|
|
|
|
NOTE: To attain a much better performance it is recommended to
|
|
use, if possible, the original GNU MP library rather than the
|
|
GLPK version, by defining the preprocessor variable GLP_USE_GMP.
|
|
|
|
* glplux.h, glplux.c
|
|
A tentative implementation of sparse LU-factorization based on
|
|
exact (bignum) arithmetic was added.
|
|
|
|
* glpssx.h, glpssx.c
|
|
A tentative implementation of some simplex method routines based
|
|
on exact (bignum) arithmetic was added.
|
|
|
|
* glplpx6f.c
|
|
A preliminary implementation of the routine lpx_exact_check was
|
|
added. This routine checks the current basis for primal and dual
|
|
feasibility using exact (bignum) arithmetic.
|
|
|
|
* examples/glpsol.c
|
|
The command-line option '--xcheck' was introduced to check the
|
|
current basis for feasibility using exact (bignum) arithmetic.
|
|
|
|
Tue Jul 25 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.11 has been released.
|
|
|
|
* include/glpbfi.h, src/glpbfi.c
|
|
Basis factorization interface routines were added.
|
|
|
|
* include/glpluf.h, src/glpluf1.c
|
|
Hypersparse solution routines were added.
|
|
|
|
* include/glpinv.h, src/glpinv1.c
|
|
Hypersparse solution routines (fake version) were added.
|
|
|
|
* include/glpmpl.h, src/glpmpl.c
|
|
Built-in functions card, length, and substr were implemented.
|
|
Output redirection in the printf statement was implemented.
|
|
|
|
* examples/graph.mod, examples/crypto.mod
|
|
Two example models illustrating new features of the modeling
|
|
language were included.
|
|
|
|
Thu May 11 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.10 has been released.
|
|
|
|
* src/glplpx8a.c
|
|
A fragment was added to the routines lpx_read_mps and
|
|
lpx_read_freemps to accept LI bound type (it is similar to LO,
|
|
however, additionally marks the column as integer).
|
|
|
|
* include/glpbfi.h, src/glpbfi.c
|
|
The module glpbfi which implements the basis factorization
|
|
interface (BFI) was added.
|
|
|
|
* src/glplpx7a.c
|
|
The routine lpx_cover_cut to generate mixed cover cuts was
|
|
added.
|
|
|
|
* src/glplpx7b.c
|
|
The routine lpx_clique_cut to generate clique cuts and related
|
|
routines to maintain the conflict graph were added.
|
|
|
|
* include/glplpx.h, src/glplpx5.c
|
|
The routine lpx_cpx_basis implementing Bixby's algorithm to
|
|
construct an initial LP basis was added.
|
|
|
|
* examples/glpsol.c
|
|
Command-line option '--bib' was added which allows building
|
|
an initial LP basis using Bixby's algorithm.
|
|
Default command-line option '--mps' was changed to '--freemps'.
|
|
|
|
* examples/cf12a.mod, examples/cf12b.mod
|
|
Two examples in MathProg (curve fitting problem) were added.
|
|
Thanks to Dr. Harley Mackenzie <hjm@hardsoftware.com>.
|
|
|
|
Tue Jan 17 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.9 has been released.
|
|
|
|
* glpipp.h, glpipp1.c, glpipp2.c
|
|
A MIP presolver were implemented (currently incomplete). It is
|
|
used internally in the routine lpx_intopt (see below).
|
|
|
|
* glplpx6d.c, glplpx7a.c
|
|
An advanced branch-and-bound solver (the routine lpx_intopt)
|
|
were implemented.
|
|
|
|
* glplpx6c.c
|
|
The routine lpx_check_int to check MIP feasibility conditions
|
|
was added.
|
|
|
|
* glplpx8a.c
|
|
The routine lpx_print_mip was changed to print MIP feasibility
|
|
conditions.
|
|
|
|
* glpmpl.h, glpmpl1.c, glpmpl3.c
|
|
The built-in functions sin, cos, atan, and atan2 were added to
|
|
the MathProg language.
|
|
|
|
* doc/lang.*
|
|
Some typos were fixed.
|
|
Thanks to Minh Ha Duong <haduong@centre-cired.fr> (CIRED, CNRS).
|
|
|
|
Wed Jan 12 12:00:00 2005 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.8 has been released.
|
|
|
|
* glpspx.h, glpspx1.c, glpspx2.c, glplpx6a.c
|
|
Simplex method routines were changed due to a new format of the
|
|
constraint matrix.
|
|
|
|
* glpmat.h, glpmat.c
|
|
Sparse matrix routines were re-implemented using storage-by-rows
|
|
format.
|
|
|
|
* glpipm.h, glpipm.c, glplpx6b.c
|
|
Interior-point method routines were changed due to a new format
|
|
of sparse matrices.
|
|
|
|
* glpchol.h, glpchol.c
|
|
Old version of Cholesky factorization routines being replaced by
|
|
a new one (see glpmat.c) was removed from the package.
|
|
|
|
* glplpx8c.c
|
|
Minor bug was fixed in api routine lpx_read_cpxlp.
|
|
|
|
Mon Aug 23 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.7 has been released.
|
|
|
|
* glplpx.h, glplpx1.c
|
|
New core API routines were added (but not documented yet):
|
|
lpx_order_matrix, lpx_create_index, lpx_find_row, lpx_find_col,
|
|
lpx_delete_index.
|
|
|
|
* glplpx8a.c
|
|
API routine lpx_read_mps was re-implemented, and two new API
|
|
routines lpx_read_freemps and lpx_write_freemps were added to
|
|
support free MPS format.
|
|
|
|
* glplpx8c.c
|
|
Two API routines lpx_read_cpxlp and lpx_write_cpxlp (formerly
|
|
named lpx_read_lpt and lpx_write_lpt) were re-implemented.
|
|
|
|
* glpmps.h, glpmps.c
|
|
This module formerly used in lpx_read_mps was removed from the
|
|
package.
|
|
|
|
* glplpt.h, glplpt.c
|
|
This module formerly used in lpx_read_lpt was removed from the
|
|
package.
|
|
|
|
* glpmip.h, glpmip1.h, glpmip2.h
|
|
New MIP routines mip_best_node and mip_relative_gap were added
|
|
due to suggestion of Brady Hunsaker <hunsaker@engr.pitt.edu>.
|
|
|
|
* glpsol.c
|
|
The following new command-options were added:
|
|
--freemps to read problem data in free MPS format
|
|
--wfreemps to write problem data in free MPS format
|
|
--cpxlp to read problem data in CPLEX LP format
|
|
--wcpxlp to write problem data in CPLEX LP format
|
|
--bas to read LP basis from a text file in MPS format
|
|
--wbas to write LP basis to a text file in MPS format
|
|
--mostf to use "most fractional" branching heuristic
|
|
--bestb to use "best bound" backtracking heuristic
|
|
|
|
* contrib/deli/*.*
|
|
GLPK Delphi interface module was temporarily removed from the
|
|
distribution due to licensing problems.
|
|
|
|
* contrib/glpkmex/*.*
|
|
GLPK Matlab interface module was temporarily removed from the
|
|
distribution due to licensing problems.
|
|
|
|
* contrib/jni/*.*
|
|
GLPK Java interface module was temporarily removed from the
|
|
distribution due to licensing problems.
|
|
|
|
Wed Aug 04 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.6 has been released.
|
|
|
|
* glpmpl.h, glpmpl1.c, glpmpl2.c, glpmpl3.c, glpmpl4.c
|
|
Three new statements were implemented in the GNU MathProg
|
|
language: solve, printf, and for. Also some bugs were fixed.
|
|
|
|
* glplpx.h, glplpx8e.c
|
|
Two API routines were added: lpx_read_prob and lpx_write_prob,
|
|
which allow reading and writing problem data in GNU LP format.
|
|
|
|
* glpsol.c
|
|
Three new command-line options were added: --glp (to read
|
|
problem data in GNU LP format), --wglp (to write problem data
|
|
in GNU LP format), and --name (to change problem name).
|
|
|
|
* glprng.h, glprng.c
|
|
A portable pseudo-random number generator was implemented as a
|
|
separate module.
|
|
|
|
* glplib4.c
|
|
The old implementation of a pseudo-random number generator was
|
|
removed from the package.
|
|
|
|
* doc/lang.*, doc/refman.*
|
|
New edition of the GLPK documentation was included.
|
|
|
|
* contrib/glpkmex/*.*
|
|
A new version of GLPKMEX was included in the distribution. For
|
|
more details see contrib/glpkmex/ChangeLog.
|
|
|
|
Mon Jul 19 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.5 has been released.
|
|
|
|
* glpmip.h, glpmip1.c, glpmip2.c, glplpx6c.c
|
|
New implementation of the branch-and-bound method was added.
|
|
It replaces the old implementation, which was removed from the
|
|
package.
|
|
|
|
* glpies.h, glpies1.c, glpies2.c, glpies3.c
|
|
Modules used in the old implementation of the branch-and-bound
|
|
method were removed from the package.
|
|
|
|
* glplib2.c
|
|
Now if the preprocessor variable GLPHUGEMEM is defined, other
|
|
version of the routines umalloc, ucalloc, and ufree is used on
|
|
compiling the package. This allows avoiding memory allocation
|
|
problems on platforms where sizeof(void *) > sizeof(int), for
|
|
example, where addresses are 64-bit while integers are 32-bit.
|
|
The modification was made due to a bug report provided by Karel
|
|
Zimmermann <kzimm@diamant.jouy.inra.fr> and Christophe Caron
|
|
<caron@diamant.jouy.inra.fr>.
|
|
|
|
Sat Jan 17 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.4 has been released.
|
|
|
|
* glplpx.h, glplpx*.c
|
|
All API routines were re-implemented using new data structures.
|
|
Some new API routines were added and some existing API routines
|
|
became obsolete as shown below:
|
|
|
|
Obsolete API routine Equivalent new API routine
|
|
lpx_check_name (no more supported)
|
|
lpx_set_obj_c0 lpx_set_obj_coef
|
|
lpx_set_row_coef (no more supported)
|
|
lpx_set_col_coef lpx_set_obj_coef
|
|
lpx_load_mat (no more supported)
|
|
lpx_load_mat3 lpx_load_matrix
|
|
lpx_unmark_all (no more supported)
|
|
lpx_mark_row (no more supported)
|
|
lpx_mark_col (no more supported)
|
|
lpx_clear_mat (no more supported)
|
|
lpx_del_items lpx_del_rows, lpx_del_cols
|
|
lpx_get_row_bnds lpx_get_row_type, lpx_get_row_lb,
|
|
lpx_get_row_ub
|
|
lpx_get_col_bnds lpx_get_col_type, lpx_get_col_lb,
|
|
lpx_get_col_ub
|
|
lpx_get_obj_c0 lpx_get_obj_coef
|
|
lpx_get_row_coef (no more supported)
|
|
lpx_get_col_coef lpx_get_obj_coef
|
|
lpx_get_row_mark (no more supported)
|
|
lpx_get_col_mark (no more supported)
|
|
lpx_get_row_info lpx_get_row_stat, lpx_get_row_prim,
|
|
lpx_get_row_dual
|
|
lpx_get_col_info lpx_get_col_stat, lpx_get_col_prim,
|
|
lpx_get_col_dual
|
|
lpx_get_ips_stat lpx_ipt_status
|
|
lpx_get_ips_row lpx_ipt_row_prim, lpx_ipt_row_dual
|
|
lpx_get_ips_col lpx_ipt_col_prim, lpx_ipt_col_dual
|
|
lpx_get_ips_obj lpx_ipt_obj_val
|
|
lpx_get_mip_stat lpx_mip_status
|
|
lpx_get_mip_row lpx_mip_row_val
|
|
lpx_get_mip_col lpx_mip_col_val
|
|
lpx_get_mip_obj lpx_mip_obj_val
|
|
|
|
Obsolete API routines were kept for backward compatibility,
|
|
however, they will be removed in the future.
|
|
|
|
* doc/refman.*
|
|
New edition of the GLPK reference manual containing description
|
|
of all new API routines was included.
|
|
|
|
* contrib/glpkmex/*.*
|
|
GLPKMEX, a Matlab MEX interface to GLPK package, contributed by
|
|
Nicolo Giorgetti <giorgetti@dii.unisi.it> was included.
|
|
|
|
* doc/GLPK_FAQ.txt
|
|
GLPK FAQ contributed by Harley Mackenzie <hjm@bigpond.com> was
|
|
included.
|
|
|
|
Fri Dec 12 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.3 has been released.
|
|
|
|
* configure.in
|
|
The bug, due to which the standard math library is not linked on
|
|
some platforms, was fixed.
|
|
|
|
* glpmpl3.c
|
|
The bug (0 ** y) was fixed in the routine fp_power.
|
|
|
|
* glpmpl.h, glpmpl1.c, glpmpl3.c
|
|
Some new built-in functions (round, trunc, Irand224, Uniform01,
|
|
Uniform, Normal01, Normal) were added to the MathProg language.
|
|
|
|
* glpmpl1.c
|
|
The MathProg syntax was changed to allow writing 'subj to'.
|
|
|
|
* glplpx.h, glplpx1.c, glplpx2.c
|
|
The new api routine lpx_get_ray_info was added.
|
|
|
|
* glplpx8a.c
|
|
The api routine lpx_print_sol was changed to print the number of
|
|
non-basic variable, which causes primal unboundness.
|
|
|
|
* glpmps.c
|
|
The code was changed to avoid errors on compiling the package on
|
|
Mac OS X. Thanks to Andre Girard <andre@inrs-emt.uquebec.ca> for
|
|
the bug report.
|
|
|
|
* doc/lang.*, doc/refman.*
|
|
Several typos were fixed and some new material was added in the
|
|
glpk documentation.
|
|
|
|
Fri Nov 14 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.2 has been released.
|
|
|
|
* glpiet.h, glpiet.c, glpios.h, glpios1.c, glpios2.c, glpios3.c
|
|
A preliminary implementation of the Integer Optimization Suite
|
|
(IOS) was included in the package. Eventually IOS will replace
|
|
the Implicit Enumeration Suite (IES).
|
|
|
|
* glplpx.h, glplpx6d.c
|
|
A dummy version of the integer optimization routine lpx_intopt
|
|
was included in the package. Later this routine will replace the
|
|
routine lpx_integer.
|
|
|
|
* examples/glpsol.c
|
|
A new command-line option --int-opt was added to the solver to
|
|
call lpx_intopt rather than lpx_integer.
|
|
|
|
* glpbcs.h, glpbcs1.c, glpbcs2.c
|
|
Being replaced by IOS routines (see above) the Branch-and-Cut
|
|
Framework (BCS) routines were removed from the package.
|
|
|
|
* examples/tspsol.c
|
|
Stand-alone Symmetric TSP solver was completely re-programmed
|
|
using IOS routines.
|
|
|
|
* glplib.h, glplib2.c, glplib4.c
|
|
The random-number generator was implemented. It is based on the
|
|
module GB_FLIB from the Stanford GraphBase originally developed
|
|
by Donald Knuth.
|
|
|
|
* glphbsm.c, glplpx8a.c, glpmps.c
|
|
All calls to fopen/fclose were replaced by corresponding calls
|
|
to ufopen/ufclose due to bug reports provided by Morten Welinder
|
|
<terra@gnu.org> and <jpark@sfwmd.gov>.
|
|
|
|
* glpmps.c
|
|
The code was made re-entrant.
|
|
|
|
* glplpx8b.c
|
|
API routine lpx_print_sens_bnds for bounds sensitivity analysis
|
|
contributed by Brady Hunsaker <hunsaker@engr.pitt.edu> was added
|
|
to the package. This feature is also available in glpsol via the
|
|
command-line option --bounds.
|
|
|
|
* contrib/jni/*.*
|
|
New version of GLPK JNI (Java Native Interface) contributed by
|
|
Chris Rosebrugh <cpr@pobox.com> was added to the package.
|
|
|
|
* contrib/deli/*.*
|
|
GLPK DELI (Delphi Interface) contributed by Ivo van Baren
|
|
<i.van.baren@freeler.nl> was added to the package.
|
|
|
|
* glplpx3.c
|
|
Default method to scale the problem was changed to equilibration
|
|
scaling (lp->scale = 1 in lpx_reset_parms).
|
|
|
|
* glplpx6a.c
|
|
Two minor (non-critical) typos were fixed due to report provided
|
|
by Andrew Hamilton-Wright <andrewhw@ieee.org>.
|
|
|
|
* glplpp2.c
|
|
An untested case (line 941) had been tested due to bug report
|
|
provided by Jiri Spitz <jiri.spitz@telecom.cz>.
|
|
|
|
* w32bc5.mak, w32vc6.mak, w32vc6d.mak, d32dmc.mak
|
|
Several makefiles were added to allow building GLPK library for
|
|
some non-GNU 32-bit platforms.
|
|
|
|
Sat Aug 23 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.1 has been released.
|
|
|
|
* glpmpl1.c, glpmpl3.c
|
|
Some bugs were fixed in the MathProg translator due to the bug
|
|
reports provided by Giles Thompson <gwpt1@cus.cam.ac.uk>:
|
|
conditional set expressions were incorrectly parsed;
|
|
dimen attribute was not set by default when a set was used
|
|
recursively in its own declaration;
|
|
logical expressions ... in if ... then ... else ... did not
|
|
work;
|
|
displaying set expressions did not free memory allocated for
|
|
temporary results.
|
|
|
|
* glpmpl3.c (reduce_terms)
|
|
Implementation of summation of linear forms over domain was
|
|
improved to reduce complexity of that operation from O(n*n) to
|
|
O(n*log n). The improvement was made due to a report provided
|
|
by Sebastien de Menten <sdementen@hotmail.com>.
|
|
|
|
* glplpx6a.c (line 1056), glpmip1.c (line 641)
|
|
Two minor bugs were fixed due to the bug report provided by
|
|
Kendall Demaree <kendal.demaree@verizon.net>.
|
|
|
|
* glplpx.h, glplpx6a.c
|
|
The method of one artificial variable implemented in the routine
|
|
lpx_prim_art and used on the phase I in the glpk simplex solver
|
|
has a serious defect: for some lp instances it erroneously
|
|
reports that the problem has no primal feasible solution. This
|
|
error appears when the column of the artificial variable, which
|
|
enters the basis to make it primal feasible, has large
|
|
constraint coefficients, that leads to small reduced costs of
|
|
non-basic variables and premature termination of the search,
|
|
i.e. to wrong conclusion that the problem has no primal feasible
|
|
solution. To avoid this defect the routine lpx_prim_feas was
|
|
included. It implements the method of implicit artifical
|
|
variables (based on minimization of the sum of infeasibilities),
|
|
which is a bit slower but much more robust. The routine
|
|
lpx_prim_feas having the same functionality now is used instead
|
|
the routine lpx_prim_art.
|
|
|
|
* glpinv.h, glpinv.c
|
|
The test used in the routine inv_update to detect low accuracy
|
|
after updating LU-factorization of the basis matrix was replaced
|
|
by a new, more robust test.
|
|
|
|
* glplpx6c.c
|
|
Selecting an active node to be solved next in the routine
|
|
btrack_bestp was changed. Now, if any integer feasible solution
|
|
has not been found yet, the routine chooses an active node which
|
|
has the minimal sum of integer infeasibilities.
|
|
|
|
* glpmip.h, glpmip1.c
|
|
The additional flag int_obj was included in the structure
|
|
MIPTREE used by the branch-and-bound. This flag is set in the
|
|
routine mip_create_tree and used in the routine is_better. It
|
|
means that the objective is integral, i.e. depends only on
|
|
integer variables with integer objective coefficients. The test
|
|
used in the routine check_integrality was also replaced by a
|
|
new, more reasonable one.
|
|
|
|
* glplpx1.c
|
|
A minor bug was fixed in the routine lpx_check_name.
|
|
|
|
* glpmpl.h, glpmpl4.c, glplpx8d.c
|
|
The flag skip_data was added to the parameter list of the
|
|
routine mpl_read_model. If this flag is set, the data section
|
|
in the model file is ignored. Corresponding change was made in
|
|
the routine lpx_read_model. Now, if both model and data files
|
|
are specified, the data section in the model file is ignored.
|
|
|
|
* glplpx8c.c
|
|
A minor bug (wrong format used for writing free columns) in the
|
|
routine lpx_write_lpt was fixed due to the bug report provided
|
|
by Bernhard Schmidt <schmidt@math.uni-augsburg.de>
|
|
|
|
* sample/glpsol.c
|
|
The command-line parameter --tmlim, which allows limiting the
|
|
solution time, was added.
|
|
|
|
* doc/lang.*, doc/refman.*
|
|
New edition of the GLPK documentation was included.
|
|
|
|
* java-binding/*.*
|
|
New version of the GLPK JNI (Java Native Interface) package was
|
|
included in the distribution.
|
|
|
|
* sample/lpglpk40.c
|
|
A non-trivial example was added. It allows using GLPK as a base
|
|
LP solver for Concorde, a program for solving Traveling Salesman
|
|
Problem (TSP). For details see comments in lpglpk40.c.
|
|
|
|
* sample/*.mod
|
|
Some examples of LP and MIP models written in GNU MathProg were
|
|
added.
|
|
|
|
Tue May 06 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 4.0 has been released.
|
|
|
|
* glpmpl.h, glpmpl1.c, glpmpl2.c, glpmpl3.c, glpmpl4.c
|
|
The model translator for the GNU MathProg modeling language was
|
|
implemented and included in the package.
|
|
|
|
* glplpx.h, glplpx8d.c
|
|
The api routine lpx_read_model, which is an interface to the
|
|
MathProg translator, was included in the package.
|
|
|
|
* glplpx.h, glplpx8a.c
|
|
The api routine lpx_print_prob for writing LP/MIP problem data
|
|
in plain text format was included in the package.
|
|
|
|
* sample/glpsol.c
|
|
New version of the GLPK stand-alone LP/MIP solver that supports
|
|
the GNU MathProg modeling language was implemented.
|
|
|
|
* doc/lang.latex, doc/lang.dvi, doc/lang.ps
|
|
The document "GLPK: Modeling Language GNU MathProg" was included
|
|
in the package.
|
|
|
|
* doc/refman.latex, doc/refman.dvi, doc/refman.ps
|
|
New edition of the GLPK Reference Manual was included in the
|
|
package.
|
|
|
|
* glplpx8c.c
|
|
A bug in the api routine lpx_write_lpt was fixed. Due to that
|
|
bug an addressing error occured in the routine if the objective
|
|
function has the non-zero constant term.
|
|
|
|
* glplan.h, glplan1.c, glplan2.c, glplan3.c, glplan4.c,
|
|
* glplan5.c, glplan6.c, glplan7.c, glplan8.c, glplpx8b.c
|
|
All modules of the translator for the GLPK/L modeling language
|
|
were removed from the package, because GLPK/L being completely
|
|
superseded by GNU MathProg is no more supported.
|
|
|
|
Tue Mar 25 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.3 has been released.
|
|
|
|
* glplpp.h, glplpp1.c, glplpp2.c
|
|
An implementation of the built-in LP presolver was added to the
|
|
package.
|
|
|
|
* glplpx.h
|
|
The flag presol was added to the structure LPX. This flag tells
|
|
the lpx_simplex whether the built-in LP presolver should be used
|
|
or not. By default this flag is off. Also three macros (namely
|
|
LPX_E_NOPFS, LPX_E_NODFS, and LPX_K_PRESOL) that concern using
|
|
the LP presolver were introduced.
|
|
|
|
* glplpx3.c, glplpx6a.c
|
|
These modules was changed to use the built-in LP presolver.
|
|
|
|
* sample/glpsol.c
|
|
Command line options --presol and --nopresol that concern using
|
|
the LP presolver were added to the stand-alone LP/MIP solver.
|
|
|
|
* glplan1.c
|
|
This module was changed to allow declaring sets like A[1:10] in
|
|
the models written in the GLPK/L modeling language.
|
|
|
|
* doc/refman.latex, doc/lang.latex
|
|
New editions of the documents "GLPK User's Guide" and "GLPK/L
|
|
Modeling Language" were included in the distribution.
|
|
|
|
* java-binding/*.*
|
|
The package GLPK JNI (Java Native Interface) implementing Java
|
|
binding for GLPK was included in the distribution. This package
|
|
was developed and programmed by Yuri Victorovich <yuri@gjt.org>.
|
|
|
|
Tue Feb 18 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.2.4 has been released.
|
|
|
|
* glplpx6b.c
|
|
The code was changed to allow auxiliary variables have non-zero
|
|
objective coefficients.
|
|
|
|
Also a minor bug was fixed (the constant term was not considered
|
|
on displaying the objective function value).
|
|
|
|
* sample/glpsol.c
|
|
The code was changed to fix a bug (the command-line option 'bfs'
|
|
was not recognized). The bug was fixed due to report provided by
|
|
Olivier <odwl@skynet.be>.
|
|
|
|
* glplpt.c
|
|
The code was changed to fix a bug (binary variables were treated
|
|
erroneously as integer ones).
|
|
|
|
* glplpx6b.c
|
|
The code was changed to fix a bug (variables that have no lower
|
|
bounds were incorrectly processed on converting to the standard
|
|
formulation). The bug was fixed due to report kindly provided by
|
|
Kjell Eikland <kjell.eikland@broadpark.no>.
|
|
|
|
Mon Nov 11 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.2.3 has been released.
|
|
|
|
* glpmip.h, glpmip1.c
|
|
A preliminary implementation of the branch-and-bound driver
|
|
based on the implicit enumeration suite (glpies) was added to
|
|
the package. This module is not documented yet.
|
|
|
|
* glplpx6c.c
|
|
A new implementation of the api routine lpx_integer which now
|
|
is based on the b&b driver (see glpmip above) was included in
|
|
the package. This new implementation has exactly the same
|
|
functionality as the old version and therefore all changes are
|
|
transparent to the api user.
|
|
|
|
* glpbbm.h, glpbbm.c
|
|
* glprsm.h, glprsm1.c, glprsm2.c
|
|
* glplp.h, glplp.c
|
|
These modules were removed from the package, because they were
|
|
used only in the old version of the routine lpx_integer, which
|
|
was replaced by the new version (see glplpx6c above).
|
|
|
|
* glplpx.h, glplpx6a.c
|
|
The api routine lpx_check_kkt was included in the package and
|
|
its description was added in the reference manual. This routine
|
|
allows checking Karush-Kuhn-Tucker optimality conditions for an
|
|
LP solution.
|
|
|
|
* glplpx.h, glplpx8a.c
|
|
Now the api routine lpx_print_sol also prints information about
|
|
"solution quality" obtained via the api routine lpx_check_kkt.
|
|
|
|
* glplpx.h, glplpx8a.c
|
|
New api routines lpx_read_bas and lpx_write_bas were included
|
|
in the package and documented. The routine lpx_write_bas allows
|
|
writing a current basis from an LP object to a text file in the
|
|
MPS format. The routine lpx_read_bas allows reading a basis
|
|
prepared in the MPS format from a text file into an LP object.
|
|
|
|
* glplpt.c
|
|
The parsing routine which reads LP problem data prepared in the
|
|
CPLEX LP format was modified to allow specifying lower bounds
|
|
of variables also in the form 'variable >= lower bound' (in the
|
|
bounds section). This modification was made due to a notice
|
|
provided by Ivan Luzzi <iluzzi@libero.it>.
|
|
|
|
* glplpx.h, glplpx8c.c
|
|
The api routine lpx_write_lpt which allows writing LP problem
|
|
data from an LP object to a text file using the CPLEX LP format
|
|
was included in the package and documented.
|
|
|
|
* glplpx.h, glplpx3.c
|
|
The control parameter LPX_K_LPTORIG that affects the behavior
|
|
of the api routine lpx_write_lpt was introduced.
|
|
|
|
* glplan6.c
|
|
The semantics of the language GLPK/L was changed to allow
|
|
selection in case when not all mute letters of a predicate (the
|
|
operand that follows the keyword 'where') are presented in a
|
|
parameter (the operand that precedes the keyword 'where'), i.e.
|
|
to allow writing something like this:
|
|
y[j] := sum(i, x[i] where p[i,j]);
|
|
The paragraph "Selection" in the langauge description (page 25)
|
|
was also correspondingly changed. This change of the language
|
|
semantics was undertaken due to a notice provided by Peter Lee
|
|
<plee@kinggee.com.au>.
|
|
|
|
* sample/hwd.lpm
|
|
A nice example of LP model written in GLPK/L and contributed by
|
|
Peter Lee <plee@kinggee.com.au> was included in the package.
|
|
|
|
* glplpx6b.c
|
|
The api routine lpx_interior was modified: a) to compute dual
|
|
values for all structural as well as auxiliary variables; b) to
|
|
allow specifying non-zero objective coefficients at auxiliary
|
|
variables.
|
|
|
|
* sample/glpsol.c
|
|
Three new command-line options were added to the solver, which
|
|
are: --plain, --orig, and --wrlpt.
|
|
|
|
Mon Oct 14 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.2.2 has been released.
|
|
|
|
* glplpt.h, glplpt.c
|
|
A module that reads LP/MIP problem data in CPLEX LP format was
|
|
implemented.
|
|
|
|
* glplpx8c.c
|
|
An api routine lpx_read_lpt that reads LP/MIP problem data in
|
|
CPLEX LP format was implemented.
|
|
|
|
* sample/glpsol.c, sample/plan.lpt
|
|
A new command-line option '--lpt' that allows reading LP/MIP
|
|
problem data in CPLEX LP format was added to the solver.
|
|
|
|
* doc/refman.latex, doc/refman.dvi, doc/refman.ps
|
|
A new edition of the Reference Manual was included.
|
|
|
|
* source/*.c
|
|
Casting to (unsigned char) was added in some calls to the
|
|
classification functions (isalpha, etc.). The bug was fixed due
|
|
to report provided by Morten Welinder <terra@diku.dk>.
|
|
|
|
* glplpx8a.c
|
|
The local routine mps_numb used in the routine lpx_write_mps
|
|
was modified to correctly format floating-point numbers that
|
|
have two digits in the decimal exponent. The bug was fixed due
|
|
to report provided by Vlahos Kiriakos <Kiriakos.Vlahos@gs.com>.
|
|
|
|
* glplan.h, glplan1.c, ..., glplan8.c
|
|
Several serious bugs were fixed in the language processor due
|
|
to reports provided by <NORBERT.PIOTROWSKI@LHSYSTEMS.COM>:
|
|
(a) a static search tree used to find sparse array elements was
|
|
sometimes overwritten that caused the message 'assertion failed'
|
|
to appear; the bug was fixed by creating separate search trees
|
|
in parsing routines; (b) a variable declared using the
|
|
predicate-controlled variable declaration statement had wrong
|
|
order of domain sets, because the variable array was built as
|
|
a copy of the predicate array; the bug was fixed by using the
|
|
internal routine transpose that coordinates mute letters (and
|
|
therefore domain sets) on copying sparse arrays; (c) sometimes
|
|
assignment statements like x[#a,#b,#c] := ... was incorrectly
|
|
processed; the bug was fixed by including an appropriate check
|
|
into the internal routine assign_stmt.
|
|
|
|
* glp_simplex.c
|
|
An additional check to see if all lower bounds are not greater
|
|
than corresponding upper bounds was included in the routine to
|
|
prevent wrong results to appear. Such incorrectness sometimes
|
|
was not detected, namely, when variables with such bounds were
|
|
non-basic and never entered the basis.
|
|
|
|
* glpspx1.c
|
|
Maximal number of simplex iterations before reinversion was
|
|
decreased from 100 to 50. This allowed to improve accuracy and,
|
|
that is more important, to reduce the solution time for many
|
|
serial lp problems approximately 1.5--2 times.
|
|
|
|
* glpspx2.c
|
|
A check to see if all elements in the column chosen to enter
|
|
the basis are close to zero in the routine spx_prim_chuzr was
|
|
temporarily removed because this check gave wrong conclusion in
|
|
case when the corresponding non-basic variable had zero column
|
|
in the constraint matrix. An analogous check to see if all
|
|
elements in the row chosen to leave the basis are close to zero
|
|
in the routine spx_dual_chuzc was also temporarily removed on
|
|
the same reason. The bug was fixed due to reports provided by
|
|
Flavio Keidi Miyazawa <fkm@ic.unicamp.br> and Vlahos Kiriakos
|
|
<Kiriakos.Vlahos@gs.com>.
|
|
|
|
Mon Aug 12 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.2.1 has been released.
|
|
|
|
* glpbcs.h, glpbcs1.c, glpbcs2.c
|
|
* glpies.h, glpies1.c, glpies2.c, glpies3.c
|
|
A preliminary implementation of the branch-and-cut framework
|
|
was included in the package.
|
|
|
|
* doc/brcut.txt
|
|
The document "GLPK: A Preliminary Implementation of the
|
|
Branch-And-Cut Framework" was included in the distribution.
|
|
|
|
* sample/tspsol.c
|
|
An illustrative program for solving symmetric TSP based on the
|
|
branch-and-cut method was included in the package.
|
|
|
|
* glpdmp.h, glpdmp.c
|
|
A new, re-enterable version of routines for managing dynamic
|
|
memory pools was included in the package.
|
|
|
|
* glpavl.h, glpavl.c
|
|
A new, re-enterable version of routines for managing AVL search
|
|
trees was included in the package.
|
|
|
|
* glplib.h, glplib2.c
|
|
Two new low-level routines ufopen and ufclose were included in
|
|
the package.
|
|
|
|
* glplpx.h, glplpx7.c
|
|
The following new api routines were added: lpx_eval_activity,
|
|
lpx_eval_red_cost, lpx_reduce_form, lpx_mixed_gomory.
|
|
|
|
* glptsp.h, glptsp.c
|
|
A module for reading TSP data using TSPLIB format was included
|
|
in the package.
|
|
|
|
Mon Jul 15 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.2 has been released.
|
|
|
|
* glplpx.h, glplpx1.c, glplpx2.c
|
|
The identifier 'class' (used as a member name in the structure
|
|
LPX and as an argument name in the routine lpx_set_class) was
|
|
changed to 'clss' in order to avoid conflicts with C++ reserved
|
|
words.
|
|
|
|
* glpk.h, glplpx.h, glplpx1.c, glplpx2.c, glplpx6a.c,
|
|
* glplpx6b.c, glplpx6c.c, glplpx7.c, glplpx8.c
|
|
The following new api routines were added: lpx_set_obj_name,
|
|
lpx_get_obj_name, lpx_get_row_mark, lpx_get_col_mark,
|
|
lpx_transform_row, lpx_transform_col, lpx_prim_ratio_test,
|
|
lpx_dual_ratio_test, lpx_interior, lpx_get_ips_stat,
|
|
lpx_get_ips_row, lpx_get_ips_col, lpx_get_ips_obj, lpx_read_lpm,
|
|
lpx_write_mps, lpx_print_ips.
|
|
|
|
* glpsol.c
|
|
The solver was completely re-programmed using new api routines.
|
|
|
|
* lang.latex, lang.dvi, lang.ps
|
|
New edition of the document "GLPK: Modeling Language GLPK/L"
|
|
was included in the distribution.
|
|
|
|
* refman.latex, refman.dvi, refman.ps
|
|
New edition of the document "GLPK: Reference Manual" (which
|
|
contains descriptions of all new api routines) was included in
|
|
the distribution.
|
|
|
|
* glpapi.h, glpapi1.c, glpapi2.c, glpapi3.c, glpapi4.c
|
|
These files (which contain old api routines) were removed from
|
|
the package.
|
|
|
|
* glpipm1.c, glpipm2.c
|
|
The file glpipm1.c was renamed to glpipm.c. The file glpipm2.c
|
|
was used only by old api routines and therefore was removed from
|
|
the package.
|
|
|
|
* language.texinfo
|
|
Old version of the document "GLPK: Modeling Language GLPK/L" was
|
|
removed from the distribution.
|
|
|
|
Mon May 27 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.1 has been released.
|
|
|
|
* glplpx.h, glplpx1.c, glplpx2.c, glplpx3.c, glplpx4.c,
|
|
* glplpx5.c, glplpx6.c, glplpx7.c, glplpx8.c
|
|
A preliminary implementation of new API routines was completed.
|
|
|
|
* refman.latex, refman.dvi, refman.ps
|
|
A draft edition of the document "GLPK Reference Manual", which
|
|
describes new API routines, was included.
|
|
|
|
* glplib3.c
|
|
A bug in measuring long time intervals was fixed up.
|
|
|
|
* glprsm3.c
|
|
This module contains some obsolete routines not longer used and
|
|
therefore it was removed from the package (into the subdirectory
|
|
'oldsrc').
|
|
|
|
* glprsm.h
|
|
Some declarations related to the module 'glprsm3.c' (see above)
|
|
were removed.
|
|
|
|
* guide.texinfo
|
|
The document "GLPK User's Guide" describing old API routines was
|
|
removed from the package (into the subdirectory 'oldsrc').
|
|
|
|
* newapi.txt
|
|
The document "New GLPK API Routines" was removed at all, because
|
|
it is superseded by the new reference manual (see above).
|
|
|
|
Mon May 13 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.8 has been released.
|
|
|
|
* glplpx.h, glplpx1.c, glplpx2.c, glplpx3.c, glplpx4.c,
|
|
* glplpx5.c, glplpx6.c, glplpx7.c
|
|
A preliminary (currently incomplete) implementation of new api
|
|
routines was included.
|
|
|
|
* sample/newsamp.c
|
|
A sample program for the new api routines was included.
|
|
|
|
* newapi.txt
|
|
A draft of the document "New GLPK API Routines" was included.
|
|
|
|
* glpapi2.c, glpapi5.c, glpapi6.c
|
|
These modules (which contain the api routines glp_call_rsm1,
|
|
glp_simplex1, glp_pivot_in, glp_pivot_out) were removed from the
|
|
package (to the subdirectory 'oldsrc') since these routines are
|
|
functionally superseded by the new api routines.
|
|
|
|
* glpk.h, glpapi2.c, glpapi3.c, glpapi4.c
|
|
The api routines glp_simplex2, glp_call_ipm1, glp_call_bbm1 were
|
|
renamed to glp_simplex, glp_interior, glp_integer, respectively.
|
|
|
|
* sample/glpsol.c
|
|
Some command-line options (which got obsolete due to the recent
|
|
changes in api) were excluded.
|
|
|
|
* doc/guide.texinfo
|
|
New edition of the document "GLPK User's Guide" was included in
|
|
the distribution to reflect the changes in some api routines.
|
|
|
|
* doc/libref.texinfo
|
|
This document was removed from the package (to the subdirectory
|
|
'oldsrc') since it describes the library routines, most of which
|
|
got obsolete and no longer used.
|
|
|
|
* Makefile.in
|
|
A minor bug was fixed up due to bug report from Hans Schwengeler
|
|
<Hans.Schwengeler@unibas.ch>.
|
|
|
|
Mon Apr 22 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.7 has been released.
|
|
|
|
* glpduff.h, glpduff.c, glpspx.h, glpspx1.c, glpspx2.c,
|
|
* glpapi7.c
|
|
These modules were replaced by a new implementation of the
|
|
simplex method and therefore they were removed from the package
|
|
(however they still can be found in the subdirectory 'oldsrc').
|
|
|
|
* glprsm1.c
|
|
The routine crash_aa was replaced by a new implementation and
|
|
therefore it was removed from the file 'glprsm1.c'.
|
|
|
|
* glplpx.h, glplpx.c, glpspx.h, glpspx1.c, glpspx2.c, glpspx3.c,
|
|
* glpspx4.c, glpapi7.c
|
|
New (currently incomplete) implementation of the simplex method
|
|
components was included in the package.
|
|
|
|
Thu Mar 28 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.6 has been released.
|
|
|
|
* glpluf.h, glpluf.c, glpinv.h, glpinv.c
|
|
New version of LU-factorization and basis maintenance routines
|
|
(based on Forrest-Tomlin updating technique) was implemented.
|
|
|
|
* glpeta.h, glpeta.c, glpfhv.h, glpfhv.c, glpgel.h, glpgel.c,
|
|
* glppfi.h, glppfi.c, glprfi.h, glprfi.c
|
|
These routines implement some other forms of the basis matrix.
|
|
Now they became obsolete being functionally superseded by the
|
|
new version of basis maintenance routines (see above) and were
|
|
removed from the package (however they still can be found in the
|
|
subdirectory 'oldsrc').
|
|
|
|
* glpbbm.c, glprsm.h, glprsm1.h, glprsm2.h, glpspx.h, glpspx2.c,
|
|
* glprsm2.c, glpsol.c
|
|
Necessary changes were made in order to use the new version of
|
|
basis maintenance routines.
|
|
|
|
Tue Jan 29 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.5 has been released.
|
|
Structure of the package was re-organized in order to simplify
|
|
its maintenance.
|
|
|
|
* doc/guide.texinfo
|
|
New edition of the document "GLPK User's Guide" was included in
|
|
the distribution. Now the document includes descriptions of some
|
|
additional API routines recently added to the package.
|
|
|
|
* doc/newapi.txt
|
|
The document "Additional GLPK API Routines" was removed from the
|
|
distribution, because the corresponding material was included in
|
|
the user's guide (see above).
|
|
|
|
Mon Dec 10 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.4 has been released.
|
|
|
|
* glpspx.h, glpspx1.c, glpspx2.c, glpapi/glp_simplex2.h
|
|
A new, more efficient version of the two-phase primal simplex
|
|
method was implemented (advanced initial basis, projected
|
|
steepest edge, recursive computations of solution components).
|
|
|
|
* glpapi/glp_call_bbm1.c
|
|
Now LP relaxation can be solved either using rsm1_driver(), or
|
|
using glp_simplex2(). The choice is controlled by the parameter
|
|
'meth' (a member of struct bbm1).
|
|
|
|
* sample/glpsol.c
|
|
The new implementation of the simplex method is now used by
|
|
default. The old version is available via --old-sim option.
|
|
|
|
* glpmat/gm_scaling.c
|
|
Now this routine displays only two lines: an initial "quality"
|
|
and a final "quality".
|
|
|
|
* glplp/prepro_lp.c
|
|
Identifiers 'fmin' and 'fmax' renamed to 'f_min' and 'f_max' in
|
|
order to avoid conflict with <math.h>. The bug was fixed due to
|
|
report provided by Sami Farin <sfarin@ratol.fi>.
|
|
|
|
Wed Oct 03 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.3 has been released.
|
|
|
|
* glprsm/harris_row.c, glprsm/harris_col.c
|
|
The relative tolerance used on the first pass of the two-pass
|
|
ratio test was replaced by the absolute tolerance.
|
|
|
|
* glprsm/rsm_primal.c, glprsm/rsm_feas.c, glprsm/rsm_dual.c
|
|
The absolute tolerance passed to the two-pass ratio test routine
|
|
was decaresed (for both primal and dual simplex).
|
|
|
|
These changes were made in order to improve numerical stability
|
|
of the simplex method.
|
|
|
|
* glprsm/glp_call_rsm1.c, glprsm/glp_call_bbm1.c,
|
|
* glprsm/glp_simplex1, glprsm/glp_pivoting.c
|
|
Default form of the inverse was changed from RFI to AFI.
|
|
|
|
Mon Sep 24 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.2 has been released.
|
|
|
|
* glpfhv.h, glpfhv.c
|
|
New version of the basis maintaining routines was implemented.
|
|
These routines, which are based on so called FHV-factorization
|
|
(a variety of LU-factorization) and Gustavson's data structures,
|
|
perform the main operations on the basis matrix faster at the
|
|
expense of some worsening numerical accuracy.
|
|
|
|
* glprsm.h, glprsm/afi.c
|
|
The routines, which implement AFI (Advanced Form of the
|
|
Inverse) based on FHV-factorization, were added to the package.
|
|
This new form is available via the parameter form = 3 (on API
|
|
level) or via the option --afi (in GLPSOL solver).
|
|
|
|
* EFI was renamed to PFI
|
|
In order to correct terminology the acronym EFI (Elimination
|
|
Form of the Inverse) was replaced by PFI (Product Form of the
|
|
Inverse) everywhere in the source code and the documentation.
|
|
|
|
* glpset/umalloc.c, glpset/ucalloc.c
|
|
* glpset/get_atom.c, glpset/get_atomv.c
|
|
These memory management routines were changed in order *not* to
|
|
clear allocated memory blocks by binary zeros.
|
|
|
|
Wed Aug 01 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0.1 has been released.
|
|
|
|
* glpapi/old_api.c, glplp/extract_lp.c, store_lpsol.c
|
|
Old API routines were deleted from the package.
|
|
|
|
* include/glpk.h, include/glpapi.h, include/glplp.h
|
|
Specifications of old API routines and data structures were
|
|
removed from the headers.
|
|
|
|
* sample/glpsol.c
|
|
New version of the stand-alone solver GLPSOL that now uses new
|
|
API routines was implemented.
|
|
|
|
* glpapi/glp_set_row_fctr.c, glpapi/glp_set_col_fctr.c,
|
|
* glpapi/glp_get_row_fctr.c, glpapi/glp_get_col_fctr.c,
|
|
* glpapi/glp_scale_prob.c
|
|
Scaling routines were added.
|
|
|
|
* glpapi/glp_write_mps.c
|
|
The routine for writing problem data in MPS format was added.
|
|
|
|
* glpapi/glp_simplex1.c
|
|
Comprehensive driver to the simplex method was added.
|
|
|
|
* glpapi/glp_pivoting.c
|
|
The routines glp_pivot_in() and glp_pivot_out() intended for
|
|
basis maintaining were added.
|
|
|
|
* glprsm/create_rsm.c, glprsm/delete_rsm.c, glprsm/scale_rsm.c,
|
|
* glprsm/build_basis.c
|
|
Additional low level routines related to the simplex method
|
|
were added.
|
|
|
|
* glpk.h, glpapi.h, glprsm.h
|
|
Additional specifications for new routines and data structures
|
|
were added.
|
|
|
|
* sample/lpglpk30.c
|
|
A non-trivial example was added. It allows using GLPK as a base
|
|
LP solver for Concorde, a program for solving Traveling Salesman
|
|
Problem (TSP). For details see comments in 'lpglpk30.c'.
|
|
|
|
* doc/newapi.txt
|
|
The document "Additional GLPK API Routines" that describes some
|
|
new API routines was included.
|
|
|
|
Thu Jul 19 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 3.0 has been released.
|
|
|
|
Now GLPK is provided with new API, which is intended for using
|
|
the package in more complex algorithmic schemes.
|
|
|
|
* glpapi/old_api.c
|
|
All routines related to old API were gathered in one file named
|
|
'old_api.c'.
|
|
|
|
* glpapi/*.c
|
|
These routines that implement new API were added to the package.
|
|
|
|
* include/glpk.h, include/glpapi.h
|
|
Specifications of new API routines and data structures were
|
|
added to these headers. Specifications of old API routines and
|
|
data structures were locked by #ifdef GLP_OLD_API directive.
|
|
|
|
* doc/guide.texinfo
|
|
New edition of the document "GLPK User's Guide" that correspond
|
|
to new API was included.
|
|
|
|
Thu Jun 14 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 2.4.1 has been released.
|
|
|
|
* doc/glpk_ml.texinfo
|
|
The new document "Modeling Language GLPK/L" was included.
|
|
|
|
* doc/glpk_ug.texinfo
|
|
New edition of the document "GLPK User's Guide" was included.
|
|
|
|
* doc/language.txt
|
|
The preliminary document "GLPK/L Modeling Language: A Brief
|
|
description" was removed from the distribution, because it has
|
|
been replaced by the new document "Modeling Language GLPK/L".
|
|
|
|
* glplang/l_spar.c
|
|
The routine comparison() was re-programmed in order to
|
|
implement the relation operation as specified in the language
|
|
description.
|
|
|
|
* glpmip.h, glpmip/*.c
|
|
The partition 'glpmip' was renamed to 'glpbbm'.
|
|
|
|
Thu May 10 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 2.4 has been released.
|
|
|
|
Now GLPK includes an implementation of a preliminary version of
|
|
the GLPK/L modeling language.
|
|
|
|
* glplang.h, glplang/*.c
|
|
The header 'glplang.h' and a set of routines that implements
|
|
the GLPK/L language processor (the partition 'glplang') were
|
|
added to the package.
|
|
|
|
* doc/language.txt
|
|
The document "GLPK/L Modeling Language: A Brief Description
|
|
(Supplement to GLPK User's Guide)" in plain text format was
|
|
included in the package (see the file 'language.txt' in the
|
|
subdirectory 'doc' of the distribution).
|
|
|
|
* ex/model1.lpm, ex/model2.lpm
|
|
Two examples of model descriptions written in GLPK/L were added
|
|
to the package.
|
|
|
|
* sample/glpsol.c
|
|
This program was modified in order: a) to allow processing
|
|
model description written in GLPK/L; b) to allow solving pure
|
|
LP problem using the interior point method.
|
|
|
|
* sample/glpipm.c
|
|
This program was removed from the package, because its function
|
|
was passed to the GLPSOL solver.
|
|
|
|
* Makefile.in
|
|
This file was changed in order to install the GLPSOL solver
|
|
executable.
|
|
|
|
Mon Apr 09 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 2.3 has been released.
|
|
|
|
* glpmip.h, glpmip/*.c
|
|
These routines (that implement the branch-and-bound method) were
|
|
re-programmed in order to improve robustness of implementation.
|
|
In particular, heuristic routines were carried out from the main
|
|
driver routine.
|
|
|
|
Additional GLPK API routines were documented.
|
|
|
|
New edition of the document "GLPK User's Guide" was included in
|
|
the package.
|
|
|
|
The preliminary document "Mixed Integer Programming Using GLPK
|
|
Version 2.2 (Supplement to GLPK User's Guide)" was removed from
|
|
the package, because this material was included in GLPK User's
|
|
Guide.
|
|
|
|
Thu Mar 15 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 2.2 has been released.
|
|
|
|
Now GLPK includes a tentative implementation of the
|
|
branch-and-bound procedure based on the dual simplex method for
|
|
mixed integer linear programming (MIP).
|
|
|
|
The preliminary document "Mixed Integer Programming Using GLPK
|
|
Version 2.2 (Supplement to GLPK User's Guide)" was included into
|
|
the package in plain text format (see the file 'mip.txt' in the
|
|
subdirectory 'doc' of the distribution).
|
|
|
|
* glpmip.h, glpmip/*.c, glpapi/glp_integer.c
|
|
These routines (that implement the branch-and-bound method) were
|
|
added to the package.
|
|
|
|
* sample/glpsol.c
|
|
This program was modified in order to allow solving LP and MIP
|
|
problems.
|
|
|
|
* glprsm/rsm_primal.c, glprsm/rsm_dual.c, glprsm/rsm_feas.c,
|
|
* glprsm/rsm1_driver.c
|
|
These routines (which are drivers to basic components of the
|
|
revised simplex method) were added to the package.
|
|
|
|
Mon Feb 19 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 2.1 has been released.
|
|
|
|
* glprsm.h, glprsm/*.c
|
|
These routines (that implement components of the revised simplex
|
|
method) were re-programmed and documented.
|
|
|
|
The document "GLPK Implementation of the Revised Simplex Method"
|
|
was included into the package.
|
|
|
|
Thu Jan 25 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 2.0 has been released.
|
|
|
|
Now GLPK includes a tentative implementation of the primal-dual
|
|
interior point method for large-scale linear programming (for
|
|
more details see the file `NEWS' in the distribution). A number
|
|
of routines related to the interior point method were added to
|
|
the package.
|
|
|
|
* insist.c
|
|
The routine `insist' and the macro of the same name were
|
|
introduced into the package in order to replace the standard
|
|
macro `assert'. Some routines require the expression specified
|
|
in the `assert' macro to be evaluated, but compiling the package
|
|
with NDEBUG option prevents from that. This bug was fixed due to
|
|
bug report provided by Peter A. Huegler <phuegler@bsco.com>.
|
|
|
|
* Makefile.in
|
|
Minor bug was fixed due to a patch provided by Alexandre Oliva
|
|
<oliva@lsd.ic.unicamp.br>.
|
|
|
|
Wed Jan 10 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 1.1.2 has been released.
|
|
|
|
* umalloc.c, ufree.c, create_pool.c, get_atom.c, get_atomv.c
|
|
These routines were changed in order to fix a bug due to
|
|
report provided by Andrew Hood <ajhood@fl.net.au>. Because of
|
|
this bug data alignment error occured on the Sparc computer.
|
|
|
|
Tue Dec 14 12:00:00 2000 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 1.1.1 has been released.
|
|
|
|
Minor bug was fixed in `Makefile.in'.
|
|
|
|
GLPK Library Reference was included.
|
|
|
|
Mon Nov 27 12:00:00 2000 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 1.1 has been released.
|
|
|
|
Minor changes were made in order to co-ordinate GLPK routines
|
|
and their descriptions.
|
|
|
|
GLPK User's Guide was included.
|
|
|
|
Fri Oct 20 12:00:00 2000 Andrew Makhorin <mao@mai2.rcnet.ru>
|
|
|
|
* GLPK 1.0 has been released.
|