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MathGroup Archive 2006

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Re: Question from a biologist

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70475] Re: Question from a biologist
  • From: "ben" <benjamin.friedrich at gmail.com>
  • Date: Tue, 17 Oct 2006 02:59:03 -0400 (EDT)
  • References: <egv9ah$r80$1@smc.vnet.net>

Dear tnad,

could you describe your problem in more detail, e.g. give an example?

One way to set something to zero in a sea of equations is

equations/.{x[t]->x0,D[x[t],t]->0}.

Maybe this is useful.

Bye
Ben

tnad schrieb:

> I'm trying to simulate some chemical reactions in mathematica using ODEs. I want to keep some of the variables (the parameters in the differential equations) constant during the simulation. Right now, I have to look for the first derivative of every variable in a sea of differential equations and set it to zero. Is there a more "elegant" way to do this in mathematica?


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