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Re: FourierTransform of Sign^2 ?


On 10    , 09:06, "Jung-Tsung Shen" <jus... at gmail.com> wrote:
> I tried to evaluate the following Fourier Transform:
>
> FourierTransform[Sign[y] Sign[y], y, q]
>
> where Sign is the sign function. Instead of Sqrt[2 Pi]*DiracDelta[q],
> Mathematica (v. 5.0, Mac) gives
>
> -Sqrt[2 Pi]*DiracDelta[q]
>
> with a minus sign. Is this a bug or I am doing something wrong here?
>
> Thanks.
>
> JT


 I think you have one more reason for upgrading!

Dimitris



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