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%%
%% A DANTE-Edition example
%%
%% Example 16-04-7 on page 244.
%%
%% 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-add}
\begin{document}
\begin{pspicture}(5,6)
\circlenode{A}{A}\quad\circlenode{C}{C}%
\quad\circlenode{E}{E}
\rput(0,4){\circlenode{B}{B}}
\rput(1,5){\circlenode{D}{D}}
\rput(2,6){\circlenode{F}{F}}
\psset{arrowscale=2,linearc=0.2,
linecolor=red,armA=0.5,
angleA=90,angleB=-90}
\ncdiag[lineAngle=20]{->}{A}{B}
\ncput*[nrot=:U]{line I}
\ncdiag[lineAngle=20]{->}{C}{D}
\ncput*[nrot=:U]{line II}
\ncdiag[lineAngle=20]{->}{E}{F}
\ncput*[nrot=:U]{line III}
\end{pspicture}
\end{document}
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