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[Bug-gsl] Re: [Help-gsl] Hypergeometric function
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From: |
Brian Gough |
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Subject: |
[Bug-gsl] Re: [Help-gsl] Hypergeometric function |
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Date: |
Mon, 31 Jan 2011 16:46:41 +0000 |
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User-agent: |
Wanderlust/2.15.6 (Almost Unreal) Emacs/23.2 Mule/6.0 (HANACHIRUSATO) |
At Thu, 27 Jan 2011 20:38:28 +0100,
Paola Alpresa Gutiérrez wrote:
> In a general case of gsl_sf_hyperg_2F1(-nu,nu+1,1,x): the function sign is
> correct for x<1/2, but it is minus the function for x>=1/2.
>
> There is a discontinuity in z=0 or x=1/2, if I am correct. I compared it
> with Mathematica.
Thanks for the bug report, I've confirmed that there is a sign problem there.
--
Brian Gough
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