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MathGroup Archive 2004

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Re: time delays

  • To: mathgroup at
  • Subject: [mg49752] Re: [mg49732] time delays
  • From: Selwyn Hollis <sh2.7183 at>
  • Date: Fri, 30 Jul 2004 06:02:05 -0400 (EDT)
  • References: <>
  • Sender: owner-wri-mathgroup at

On Jul 29, 2004, at 7:45 AM, Kimberly Dodd wrote:

> I have what I think should be a simple question: How do I incorporate
> time delays into a simple SIR model? I would like to add a time delay
> into the resistant class, however, I receive an error 256 when I try.
> Any advice?
> Thank you!

There's a package for delay-differential equations by Alan Hayes at 

I'm not certain, but it might do what you want.

Selwyn Hollis
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