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MathGroup Archive 2004

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FourierTransform

  • To: mathgroup at smc.vnet.net
  • Subject: [mg52517] FourierTransform
  • From: "Dr A.H. Harker" <a.harker at ucl.ac.uk>
  • Date: Tue, 30 Nov 2004 05:24:41 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

In Version 4 Mathematica was smart enough to know that

FourierTransform[f'[x], x, k]

should give

-\[ImaginaryI] k FourierTransform[f[x], x, k].

 Version 5 seems no longer to do this -- a nice classroom demonstration and
a valuable method of solving differential equations down in flames.  

  Why is this?


 Tony Harker (Dr A.H. Harker)
 Deputy Head of Department
 Deputy Head, Condensed Matter and Materials Physics Group
 Department of Physics and Astronomy
 University College London
 Gower Street
 LONDON
 WC1E  6BT
 (44)(0)207 679 3404
 a.harker at ucl.ac.uk




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