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Source de ode01.tex

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    \begin{pspicture}(0,-1)(3,20)\psgrid
      \psplot[linewidth=4\pslinewidth, linecolor=green]{0}{3}{2.71828182846 x exp}
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      \rput*(3.3,19){\psline[linecolor=magenta](-.75cm,0)}
      \rput*[l](3.3,19){\small\textsc{Euler} ordre 1 $h=0{,}2$}
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      \rput*[l](3.3,17){\small\textsc{Euler} ordre 1 $h=0{,}02$}
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      \rput*[l](3.3,15){\small RK ordre 4 $h=0{,}2$}
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      \rput*[l](3.3,13){\small RK ordre 4 $h=1$}
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      \rput*[l](3.3,11){\small solution exacte}
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