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/*
:Tags: PGF, Preproc
This example graph was contributed by Teresa Gomez-Diaz, and shows
that the ``texlbl`` attriute can contain arbitrary LaTeX markup.
Generated with::
$ dot2tex -tmath --autosize poltab.dot > poltab.tex
*/
digraph G {
rankdir=LR;
node [shape=plaintext];
a_1 [texlbl="$\begin{array}{l} \fbox{1}\fbox{1} \end{array}$"];
a_2 [texlbl="$\frac{1}{q} \begin{array}{l} \fbox{2}\fbox{1} \end{array} + \begin{array}{l} \fbox{1}\fbox{2} \end{array}$"];
a_3 [texlbl="$(q+\frac{1}{q}) \begin{array}{l} \fbox{2}\fbox{2} \end{array}$"];
a_4 [texlbl="$\frac{1}{q} \frac{1}{z_1} \begin{array}{l} \fbox{1}\fbox{2} \end{array} + \frac{1}{z_2}\begin{array}{l} \fbox{2}\fbox{1} \end{array}$"];
{ rank=same; a_1; a_2; a_3;}
{ nodesep =1; a_2; a_4;}
a_1 -> a_2 [label="f_1" ];
a_2 -> a_3 [label="f_1" ];
a_1 -> a_4 [label="f_0" dir=back];
a_3 -> a_4 [label="f_0" ];
}
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