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Re: ODE Stiff Systems

  • To: mathgroup at smc.vnet.net
  • Subject: [mg106392] Re: [mg106360] ODE Stiff Systems
  • From: Mark McClure <mcmcclur at unca.edu>
  • Date: Mon, 11 Jan 2010 05:31:44 -0500 (EST)
  • References: <201001100830.DAA05579@smc.vnet.net>

On Sun, Jan 10, 2010 at 3:30 AM, MacDonald, Calum (MAT)
<C.A.MacDonald at gcal.ac.uk> wrote:
> I am trying to solve an ODE numerically using NDSolve but get a message
> "step size is effectively zero; singularity or stiff system suspected."
> Can anyone please suggest an otion I can use along with 'Method' to attempt to
> overcome the problem?

Of course, it's hard to advise without a specific example but, if you
type the word "stiff" into either the Mathematica 7 Documentation
Center or the online documentation center here:
http://reference.wolfram.com/mathematica/guide/Mathematica.html, you
will find a wealth of information on stiffness in ODEs.

Mark McClure


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