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%%
%% A DANTE-Edition example
%%
%% Example 16-04-22 on page 249.
%%
%% Copyright (C) 2011 Herbert Voss
%%
%% 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.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}
\usepackage{pstricks,pst-node}
\begin{document}
\rnode{A}{\psframebox{start}}\qquad%
\rnode{M}{\psframebox{middle}}\qquad
\rnode{B}{\psframebox{end}}
\ncline{->}{A}{M}\ncline{->}{M}{B}
\ncloop[loopsize=0.9,arm=0.4,
linearc=.2,angleB=180]{->}{A}{B}
\end{document}
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