%%
%% A DANTE-Edition example
%%
%% Example 16-07-2 on page 257.
%%
%% 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}
\begin{pspicture}(-0.5,0)(3,3) \Huge
\cnode(1,3){4pt}{A}
\rput[B](0,0){\Rnode{B}{A}}
\rput[B](2,0){\Rnode{C}{a}}
\psset{angleA=90,armA=1,nodesepA=3pt}
\nccurve[angleB=-135]{<-}{B}{A}
\nccurve[angleB=-45]{<-}{C}{A}
\end{pspicture}
\end{document}
