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Re: [Help-gsl] Integration involving Bessel Function

 From: Gideon Simpson Subject: Re: [Help-gsl] Integration involving Bessel Function Date: Sun, 6 Jun 2010 23:35:48 -0400

What you're trying to do is perform a Hankel transform of order 0 at wave
number 1.  See http://en.wikipedia.org/wiki/Hankel_transform.  I think you're
best bet, off the shelf, is to use the DHT, the discrete hankel transform,
which is part of the GSL library.  If your function F(x) decays sufficiently
rapidly, the DHT should be satisfactory.

-gideon

On Jun 2, 2010, at 6:33 AM, address@hidden wrote:

> Dear Sir,
>
> I am a beginer with gsl and I am trying to do an integration of the form:
>
> \int_0^\infty [ x J0(x) F(x) ].
>
> J0(x) being oscillatory makes the integrtal +ve and -ve within its
> consecutive zero's. Form of F(x) is such that the overall integrand is a
> decaying function of x.
>
> How to handle this type of integration using gsl.
>
> I tried using "gsl_integration_qag", but its not giving the correct results.
>
> with best regards,
> Prithwish
>
> _______________________________________________
> Help-gsl mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/help-gsl



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