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MathGroup Archive 2004

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Re: Problem with FourierTransform

  • To: mathgroup at smc.vnet.net
  • Subject: [mg50011] Re: Problem with FourierTransform
  • From: "Peter Pein" <petsie at arcor.de>
  • Date: Wed, 11 Aug 2004 05:53:09 -0400 (EDT)
  • References: <cetevp$6hf$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

"Oliver" <ofr at interims.de> schrieb im Newsbeitrag
news:cetevp$6hf$1 at smc.vnet.net...
> Why doesn't this work:
> This FT can be computed without problems
>   FourierTransform[Sin[t^2]/2+1/2]
> But this one
>   FourierTransform[Sin[t^2/c]/2+1/2]
> gives error:
>   Simplify::"fas": "Warning: self-contradictory
>   assumptions encountered."
> Why?
>
> Oliver
>
Hi Oliver,

strange...

In[1]:=
  $Version
  FourierTransform[1/2*Sin[t^2/c] + 1/2, t, w]
Out[1]=
  "4.0 for Microsoft Windows (July 16, 1999)"
Out[2]=
  Sqrt[Pi/2]*DiracDelta[w] + (Cos[1/4*Sqrt[c^2]*w^2] -
    Sqrt[1/c^2]*Sqrt[c^2]*Sin[1/4*Sqrt[c^2]*w^2])/
   (4*(1/c^2)^(1/4)*Sign[c])

-- 
Peter Pein, Berlin
to write to me, start the subject with [




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