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

*To*: mathgroup at smc.vnet.net*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 wolfram.com

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 ?