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MathGroup Archive 2006

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Re: FoourierTransform of a function defined in sections

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70199] Re: FoourierTransform of a function defined in sections
  • From: Mariusz Jankowski <mjankowski at usm.maine.edu>
  • Date: Sat, 7 Oct 2006 07:07:38 -0400 (EDT)
  • References: <eg4soa$ffu$1@smc.vnet.net>

Eckhard Schlemm wrote:
> Hello,
> 
> I want Mathematica to calculate the FourierTransform of a function which is
> defined by Sin[x]^2 for Abs[x]<PI and zero else. I tried and defined the
> function g as follows:
> 
> g[x_]:=If[Abs[x]>PI,0,Sin[x]^2];
> 
> That works fine. But if I have mathematica try to determine the
> FourierTransform by
> 
> FourierTransform[g[x],x,p]
> 
> I always get the error that the recursion limit and the iteration limit were
> exceeded...
> 
> what am I'm doing wrong?
> 
> Any help is appreciated
> 
> thanks
> 
> Eckhard
> 
> --
> _________________________
> Ludwig Schlemm
> Tel: +49 (0) 160 91617114
> LudwigSchlemm at hotmail.com
> 
> 


Do not use If, use Piecewise or combinations of UnitStep, Mariusz


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