MathGroup Archive 1997

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

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  • Subject: [mg8564] B.C.'s in NDSolve for non-linear ODE's
  • From: Carlos Marques <marques at phoenix.Princeton.EDU>
  • Date: Sat, 6 Sep 1997 23:16:27 -0400
  • Organization: Princeton University
  • Sender: owner-wri-mathgroup at

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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