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Re: another question about NDSolve

  • To: mathgroup at smc.vnet.net
  • Subject: [mg43020] Re: [mg42993] another question about NDSolve
  • From: Selwyn Hollis <selwynh at earthlink.net>
  • Date: Fri, 8 Aug 2003 00:26:33 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Sabrina,

Use the equations. In your example, y'[t] < 0 would be the same as c - 
x[t] < 0.

-----
Selwyn Hollis
http://www.math.armstrong.edu/faculty/hollis

On Thursday, August 7, 2003, at 12:53  AM, sabrina wrote:

> Hello, all:
> I am wondering if there is some way to define a stooping test in 
> NDSolve. My
> problem is that the stopping test depends on x'[t], instead of x[t], 
> how
> should I do it?
>
> E.g:
> x'(t)= ax(t)-by(t),
> y'(t)=c-x(t), when x(t) ==d  and y'(t)<0( say a constant)
>
> Thanks a lot :)
>
> Sabrina
>
>
>


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