%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 15-04-5 auf Seite 273.
%% 
%%  Copyright (C) 2016 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[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-node}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(3.5,2.5)
  \rput(1.5,1.8){\ovalnode{A}{Wurzel}} \rput[lb](0,0){\ovalnode{B}{1}}
  \rput[b](1.5,0){\ovalnode{C}{2}}     \rput[rb](3,0){\ovalnode{D}{3}}
  \ncline{->}{A}{B} \ncline{->}{A}{C} \ncline{->}{A}{D}
\end{pspicture} \qquad \begin{pspicture}(3.5,2.5)
  \rput(1.5,1.8){\ovalnode{A}{Wurzel}} \rput[lb](0,0){\ovalnode{B}{1}}
  \rput[b](1.5,0){\ovalnode{C}{2}}     \rput[rb](3,0){\ovalnode{D}{3}}
  \ncdiag[arm=0,angleA=80,angleB=-160]{<-}{B}{A}  \ncline{->}{A}{C}
  \ncdiag[arm=0,angleA=100,angleB=-20]{<-}{D}{A}
\end{pspicture}
\end{document}
