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+%% 
+%%  A DANTE-Edition example
+%% 
+%%  Example 23-05-20 on page 368.
+%% 
+%%  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{375.57637pt}
+\setlength\parindent{0pt}
+\def\func{ x 3 exp x y 4 exp mul add x 5 div sub 10 mul
+  2.729 x dup mul y dup mul add neg exp mul
+  2.729 x 1.225 sub dup mul y dup mul add neg exp add }
+
+\usepackage{pstricks,pst-3dplot}
+
+\begin{document}
+\psscalebox{0.8}{%
+\begin{pspicture}(-6,-3)(6,4)  \psset{Beta=15}
+  \psplotThreeD[plotstyle=curve,drawStyle=xyLines,hiddenLine=true,
+    yPlotpoints=50,xPlotpoints=50,linewidth=0.2pt](-4,4)(-4,4){\func}
+  \pstThreeDCoor[xMax=5,yMax=5,zMax=3.5]
+\end{pspicture}}
+\end{document}