MathGroup Archive: August 2003 [00096]

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another question about NDSolve

To: mathgroup at smc.vnet.net
Subject: [mg42993] another question about NDSolve
From: sabrina <newbie at newbie.com>
Date: Thu, 7 Aug 2003 00:53:54 -0400 (EDT)
Organization: Case Western Reserve University, Cleveland, OH, USA
Sender: owner-wri-mathgroup at wolfram.com

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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