%%
%% A DANTE-Edition example
%%
%% Example 17-05-1 on page 284.
%%
%% 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{201.70511pt}
\setlength\parindent{0pt}
\usepackage{pst-tree}
\begin{document}
\pstree{\Toval{root}}{%
\Tcircle[linewidth=3pt]{A}
\Tcircle{B}}\quad
\def\thickline#1#2{%
\ncline[linewidth=3pt]{#1}{#2}}
\pstree{\Toval{root}}{%
\Tcircle[edge=\thickline]{A}
\Tcircle{B}}
\end{document}
