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MathGroup Archive 2005

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Unexpected non-evaluation problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg63124] Unexpected non-evaluation problem
  • From: "Carl Cotner" <carl.cotner at gmail.com>
  • Date: Thu, 15 Dec 2005 03:06:33 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

I am totally baffled by the following Mathematica behavior:

  In[1]:= InverseFourierTransform[FourierTransform[x^2, x, y], y, x]
  Out[1]= Sqrt[2 Pi] x^2 FourierTransform[DiracDelta[y], y, x]

  In[2]:= Sqrt[2 Pi] x^2 FourierTransform[DiracDelta[y], y, x]
  Out[2]= x^2

I've already asked my local guru without success, so I'm hoping someone
here can help me. Does anyone know why the first expression doesn't
evaluate to x^2 all by itself? How I can force it to do so?

Carl


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