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15 lines
492 B
15 lines
492 B
\begin{center}
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\begin{forest}
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for tree={circle, draw, no edge,
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minimum size=2em,
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inner sep=0pt,
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s sep=5mm,
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l sep=5mm}
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[$f$, rectangle, draw, tikz={\draw [line] () to (a.north);}
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[$a$, name=a, tikz={\draw [line, bend right] () to (c.north west); \draw [fulldot=.5, bend left] () to (c.north east);}
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[$c$, name=c, tikz={\draw [line] () to (260:3.4); \draw [fulldot=.5] () to (280:3.4);}
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]
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]
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]
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\end{forest}
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\end{center}
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