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MathGroup Archive 1999

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FourierTransform Bug V4

  • To: mathgroup at
  • Subject: [mg20445] FourierTransform Bug V4
  • From: Lawrence Walker <lwalker701 at>
  • Date: Tue, 26 Oct 1999 00:33:21 -0400
  • Organization: Morgan State University: COMSARE
  • Sender: owner-wri-mathgroup at

FourierTransform of v4 returns incorrect values.  For
example, the following is computed in version 4:

FourierTransform[UnitStep[t], t, w, FourierParameters ->

= -(I/w) - Pi*DiracDelta[w]

But version 3 correctly returns

-(I/w) + Pi*DiracDelta[w]

How can I fix this?  Perhaps Unprotect[FourierTransform]...




     (\___/)     The fear of the LORD is the beginning of
     (o\ /o)     wisdom: a good understanding have all they
    /|:.V.:|\    that do his commandments: his praise
    \\::::://    endureth for ever.              Psa 111:10
-----`"" ""`------------------------------------------------

        Lawrence A. Walker Jr., M.Eng./Ph.D. Candidate
                   Morgan State University
          Clarence M. Mitchell School of Engineering
 COMSARE (Center Of Microwave/Satellite And RF Engineering)
           Rm: 306-Schafer     Phone: (443)885-1453

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