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Re: ODE Stiff Systems

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  • Subject: [mg106392] Re: [mg106360] ODE Stiff Systems
  • From: Mark McClure <mcmcclur at>
  • Date: Mon, 11 Jan 2010 05:31:44 -0500 (EST)
  • References: <>

On Sun, Jan 10, 2010 at 3:30 AM, MacDonald, Calum (MAT)
<C.A.MacDonald at> 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:, you
will find a wealth of information on stiffness in ODEs.

Mark McClure

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