MathGroup Archive 2000

[Date Index] [Thread Index] [Author Index]

Search the Archive

Symbolic Fourier Transform

  • To: mathgroup at
  • Subject: [mg26476] Symbolic Fourier Transform
  • From: Blimbaum Jerry DLPC <BlimbaumJE at>
  • Date: Fri, 22 Dec 2000 22:46:13 -0500 (EST)
  • Sender: owner-wri-mathgroup at

	If you type in FourierTransform[ D[ f [t] ,t ],t,w]  you get back  -
I w FourierTransform[ f[t], t, w ], however if you type in

	FourierTransform[ D[ f[x,t],t], t, w]    you get back
FourierTransform[ f ^(0,1)[x,t], t, w]  whereas I expected (-I w)^2
FourierTransform[f[x,t], t, w]. 

	  I tried the same ideas with Laplace Transform  but there I  got
back what I expected,namely: 

	-f[0] + s LaplaceTransform[f[t],t,s]


	-f[x,0] + s LaplaceTransform[ f[x,t],t,s]

	Why  the differences?

	thanks...Jerry Blimbaum  NSWC  Panama City, Fl


  • Prev by Date: Re: Help me
  • Next by Date: Re: Rotated Label Bad With Ratios
  • Previous by thread: Re: Infinite sum of n^2 Exp[-n^2]
  • Next by thread: FW: Symbolic Fourier Transform