[pstricks] Two fail --- Backward solution?

[Dominique RODRIGUEZ]

David,

For the plotting backward in time, it is working for the rk4 method but not for the
varrkiv, please try:

\psplotDiffEqn[linecolor=blue,method=rk4,varsteptol=0.0001]{0}{-2}{1.5}{\Funct}

I will look why there is a pb with the var step method.

Regards
Dominique
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