\documentclass[tikz]{standalone} \usetikzlibrary{positioning} \begin{document} \begin{figure} \centering \begin{tikzpicture}[ thin, level 1/.style={sibling distance=40mm}, level 2/.style={sibling distance=25mm}, level 3/.style={sibling distance=20mm}, every circle node/.style={minimum size=0mm, inner sep=0mm} ] \node[circle,fill] (root) {} child { node [circle,draw] {} child { node [circle,fill] {} edge from parent } child { node [circle,draw] {} edge from parent } edge from parent } child { node [circle,fill] {} child { node [circle,fill] (y2) {} child { node [circle,draw] {} edge from parent } child { node [circle,draw] {} edge from parent } edge from parent } child { node [circle,draw] (z4) {} child { node [circle,draw] {} edge from parent } child { node [circle,draw] {} edge from parent } edge from parent } } %\draw (y2) -- (z4) \end{tikzpicture} \caption{mit perfect recall}\label{SP12} \end{figure} \enddocument
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