MathGroup Archive 2013

[Date Index] [Thread Index] [Author Index]

Search the Archive

NDSolve differences between mathematica 8 and 9

  • To: mathgroup at smc.vnet.net
  • Subject: [mg129560] NDSolve differences between mathematica 8 and 9
  • From: Teresa <teresajane88 at gmail.com>
  • Date: Thu, 24 Jan 2013 01:17:40 -0500 (EST)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Delivered-to: l-mathgroup@wolfram.com
  • Delivered-to: mathgroup-newout@smc.vnet.net
  • Delivered-to: mathgroup-newsend@smc.vnet.net

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 non-numerical 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.



  • Prev by Date: Re: goto label, no loop, Mathematica 6
  • Next by Date: Re: Saving mov in v9
  • Previous by thread: Solving Ï(x)=n, where Ï(x) is Euler's totient func
  • Next by thread: NDSolve differences between mathematica 8 and 9