%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 6-7-32 on page 439.
%%
%% Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See
http://www.latex-project.org/lppl.txt for details.
%%
\documentclass{ttctexagray}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
\StartShownPreambleCommands
\usepackage[dvipsnames]{pstricks} \usepackage{gastex}
\StopShownPreambleCommands
\begin{document}
\psset{unit=2.5pt}
\begin{pspicture}(-35,-37)(85,15)
\node[Nw=16,linecolor=Yellow,fillcolor=Yellow](A)(-20,0){initial}
\imark[iangle=200,linecolor=Peach](A)
\node[Nmr=0,Nw=14,fillgray=0.85,
dash={1}0](B)(20,0){\textcolor{RedViolet}{final}}
\fmark[flength=10,fangle=-30,dash={3 1 1 1}0](B)
\node[Nadjust=wh,Nadjustdist=2,Nmr=3,Nmarks=r,linecolor=Green](C)(60,-20){%
$\left(\begin{array}{ccc}
2 & 1 & 0 \\
-1 & 0 & 1 \\
0 & -1 & 2
\end{array}\right)$}
\rmark[linecolor=Green,rdist=1.4](C)
\drawedge[curvedepth=5,linecolor=Red](A,B){\textcolor{Cyan}{curved}}
\drawedge[ELside=r,ELpos=35](A,B){straight}
\drawedge[curvedepth=-25,ELside=r,dash={1.5}0](A,B){far}
\drawloop[ELpos=75, loopangle=150, dash={0.2 0.5}0](A){loopCW}
\drawloop[loopCW=n,ELside=r,loopangle=30,dash={3 1.5}{1.5}](B){loopCCW}
\drawqbpedge[ELside=r,ELdist=0,dash={4 1 1 1}0](B,-90,C,180){qbpedge}
\drawloop[ELpos=70,loopangle=0](C){$b / 01$}
\drawloop[loopCW=n,ELpos=75,ELside=r,loopangle=-90,sxo=6](C){$a / 01$}
\drawloop[ELpos=75,loopangle=-90,sxo=-6](C){$b / 10 $}
\drawloop[loopangle=50](C){$b / 01$}
\drawloop[ELpos=75,loopangle=148](C){$b / 01$}
\end{pspicture}
\end{document}
