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MathGroup Archive 2007

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Re: numerical inversion of laplace transform

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74854] Re: [mg74827] numerical inversion of laplace transform
  • From: bsyehuda at gmail.com
  • Date: Sun, 8 Apr 2007 05:07:21 -0400 (EDT)

Hi Dan,
Inversion is not so straightforward as the direct transformation. Many times
tricks are involved.
Therefore, it would help if you provide the expressions for the functions
regards
yehuda

On 4/7/07, dantimatter <dantimatter at gmail.com> wrote:
>
>
> hello all,
>
> i have a function G(t) which is a convolution of F(t) and p(t):
> G=F*p .
> now p(t) is a step function (p(t)=UnitStep[30-t]) and i know what G(t)
> is, but i'd like to get at F.  what i've been trying to do is take the
> laplace transform of G and dividing by the laplace transform of p,
> then inverting that to get F. i'm having a lot of trouble.   the built
> in inverseLaplaceTransform function is unable to do it, and i haven't
> found any numerical routines that are reliable.  is there some reason
> why i shouldn't be able to do this?  perhaps there are better ways to
> get at F(t)?  your advice is much appreciated.
>
> thanks,
> dan
>
>
>


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