Teresa
Posts:
4
From:
Perth, Australia
Registered:
1/23/13


NDSolve differences between mathematica 8 and 9
Posted:
Jan 25, 2013 1:33 AM


Hello,
I am using mathematica 9 and having some problems with a particular expression, but when I tried it on mathematica 8 it worked perfectly. My expression is:
NDSolve[{D[T[n,z],n]+i 2 D[T[n,z],{z,2}]+z^2 T[n,z]==0,T[0,z]==1,Derivative[0,1][T][n,5]==0,Derivative[0,1][T][n,0]==0},T,{n,0,5},{z,0,5}]
where i is the imaginary number, and on both I had a new window to work on, with nothing having been done previously on it.
Mathematica 8 gave me this: {{T> InterpolatingFunction[{{0.,5.},{0.,5.}},<>]}}
and mathematica 9 gave me this: NDSolve::ndnum : Encountered nonnumerical value for a derivative at n==0.`.>>
Does anyone know what is going on here? I cannot use mathematica 8, as I do not have continual access to that machine.
Thank you for your help.

