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+%%
+%% Ein Beispiel der DANTE-Edition
+%%
+%% 7. Auflage
+%%
+%% Beispiel 29-03-10 auf Seite 646.
+%%
+%% 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{pstricks-add}
+%StopShownPreambleCommands
+\begin{document}
+\psset{xunit=.5,yunit=0.7,plotpoints=500,method=rk4}
+\begin{pspicture}(0,-4.25)(24,5.25)
+ \psaxes[Dy=2,dx=2]{->}(0,0)(0,-4)(24,5)
+ \psplotDiffEqn[linewidth=1.5pt,linecolor=black!40,plotpoints=50]{0}{24}{5 0}%
+ {dup 3 1 roll -4 div exch 2 mul sub}
+ \psplotDiffEqn[linewidth=1.5pt,linecolor=black,algebraic]{0}{24}{5 0}%
+ {y[1]|-y[1]/4-2*y[0]}
+ \psplot[linestyle=dashed,linecolor=red]{0}{24}{% theoretische Lösung
+ Euler x -8 div exp x 127 sqrt 8 div mul RadtoDeg dup cos
+ 5 mul exch sin 127 sqrt div 5 mul add mul}
+\end{pspicture}
+\end{document}