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6 lines
512 B
6 lines
512 B
\textbf{$\mathcal{T}$-satisfiablility.} A \emph{formula $\varphi$ is satisfiable in a theory $\mathcal{T}$}, or $\mathcal{T}$-satisfiable, if and only if there is a
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model $\mathcal{M}$ within $\mathcal{T}$ that satisfies $\varphi$ (i.e., $\mathcal{M} \models A$ for every $A \in \mathcal{A}$
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and $\mathcal{M} \models\varphi$).
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\textbf{$\mathcal{T}$-valid.} A \emph{formula $\varphi$ is valid in a theory $\mathcal{T}$}, or $\mathcal{T}$-valid, if and only if all
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models within $\mathcal{T}$ satisfy $\varphi$.
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