%%
%% A DANTE-Edition example
%%
%% Example 28-02-36 on page 547.
%%
%% 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{225.70511pt}
\setlength\parindent{0pt}
\usepackage{pstricks-add,pst-func}
\begin{document}
\begin{pspicture*}(-3,-3.2)(3.5,3.5)
\psaxes{->}(0,0)(-3,-3)(3.2,3)
\psplotImp[linewidth=2pt,
linecolor=green](-6,-6)(4,2.4){
x 3 exp y 3 exp add
4 x y mul mul sub }
\uput*[45](-2.5,2){%
$\left(x^3+y^3\right)-4xy=0$}
\end{pspicture*}
\end{document}
