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help needed to solve ODE problem

 
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dchashper
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Joined: 21 Jun 2007
Posts: 1
Location: Canada
PostPosted: Thu Jun 21, 2007 1:09 pm    Post subject: help needed to solve ODE problem Reply with quote
I need to prove that infinite is unstable in the following system.

dx/dt=y+f(x)
dy/dt=x-y+z
dz/dt=-y

When f(x) is a function such that Kx->f(x) for all x big enough (K>0).
Thanks.
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