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Re: [Help-gsl] dawsons integral for imaginary arguments

From: Carsten Fortmann
Subject: Re: [Help-gsl] dawsons integral for imaginary arguments
Date: Thu, 20 Apr 2006 17:46:26 +0200
User-agent: Mozilla Thunderbird 1.0.7 (X11/20051013)

Brian Gough wrote:
Carsten Fortmann writes:
 > I need the following expression
> > exp(x*x)erfc(x) (1). > > Due to the exp(x*x) (not exp(-x*x)!!!), > this expression returns a nan for large arguments. I found out, that > (1) is in principal given by dawsons integral for purely imaginary > argument. Does anyone know how to obtain this in gsl?


Apart from constant factors it is 1/gsl_sf_hazard().

Right, I didn't see that one. Thanks a lot, it works fine.

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