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%%
%% A DANTE-Edition example
%%
%% Example 16-02-7 on page 230.
%%
%% 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{153.70511pt}
\setlength\parindent{0pt}
\usepackage{pstricks,pst-node}
\begin{document}
\Cnode[radius=.3cm](.25,0){A}
\Cnode[radius=.3cm](2.5,0){B}
\ncangle[angleA=45,angleB=135]{->}{A}{B}%
\nccurve[angleB=-45,angleA=-135]{->}{B}{A}
\par\vspace{1cm}
\Cnode[radius=.3cm](.25,0){A}
\Cnode[radius=.3cm](2.5,0){B}
\nccurve[angle=30]{->}{A}{B}
\nccurve[angleB=-45,angleA=-135]{->}{B}{A}
\end{document}
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