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Re: NDSolve backward in time

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  • Subject: [mg109597] Re: NDSolve backward in time
  • From: "Kevin J. McCann" <Kevin.McCann at>
  • Date: Fri, 7 May 2010 06:30:11 -0400 (EDT)
  • References: <hrtvse$s6q$>

Hi Bruno,

I use NDSolve in the "backwards" direction for quantum mechanical 
scattering. Just do NDSolve as usual, i.e. {t,-10,10}, for example, but 
specify the initial conditions at the right-hand end.

I have a notebook on QM scattering I can send you if you are interested.


Bruno Silva wrote:
> Hi,
> It is a common strategy to integrate an ode with time flowing in the
> opposite direction, to get an idea of possible unstable equilibria.
> Does anyone know how to ask NDSolve to integrate "backward" in time?
> Thanks,
> Bruno

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