MathGroup Archive 1997

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B.C.'s in NDSolve for non-linear ODE's


Hi, the NDSolve package in Mathematica 3.0 is a good improvement over 
past RungeKutta routines and similar stuff. One can now use boundary 
conditions at different points for linear ODE's (say y''[x]==  y[x] 
with y[0]==1 and y[1]== 0.5) or non-linear ODE's (say y''[x]= - 2 y[x] 
(1-y[x]^2) )  with B.C.'s at the SAME point, BUT NOT non-linear ODE's 
with B.C.'s at different points. As far as I can tell the guys from 
Wolfram really decided to stop their efforts one head short from 
completing what could be a really nice package. Is there anyone 
frustrated enough with the situation to have implemented a patch that 
improves NDSolve ?


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