[Bug-gsl] [bug #26706] gsl_sf_hyperg_U(-2.0, 0.5, 1.13) gives incorrect result

[Brian Gough]

URL:
  <http://savannah.gnu.org/bugs/?26706>

                 Summary: gsl_sf_hyperg_U(-2.0, 0.5, 1.13) gives incorrect
result
                 Project: GNU Scientific Library
            Submitted by: bjg
            Submitted on: Thu 28 May 2009 04:20:24 PM BST
                Category: Runtime error
                Severity: 3 - Normal
        Operating System: 
                  Status: Confirmed
             Assigned to: None
             Open/Closed: Open
                 Release: 1.12
         Discussion Lock: Any

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Details:

From: Kovid Goyal <address@hidden>
To: address@hidden
Subject: [Bug-gsl] Bug in gsl_sf_hyperg_U
Date: Wed, 27 May 2009 18:38:37 -0700

[1  <multipart/signed (7bit)>]
[1.1  <text/plain; us-ascii (quoted-printable)>]
Hi,

The Hyper geometric U function gsl_sf_hyperg_U gives incorrect results on a
linux x86 machine (gsl version 1.12).

For example:

gsl_sf_hyperg_U(-2.0, 0.5, 1.13) gives 0.75 which is the wrong value (it is
the
expected value for x = 0.

Running gsl_sf_hyperg_U(-2.0, 0.5, 0) gives a domain error.

I'm not subscribed to the list, so please CC replies to
address@hidden

Thanks,

Kovid.
-- 
_____________________________________

Dr. Kovid Goyal 
http://www.kovidgoyal.net
http://calibre.kovidgoyal.net





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