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Re: [Bug-gsl] GSL gsl_sf_hyperg_2F1_e

From: Patrick Alken
Subject: Re: [Bug-gsl] GSL gsl_sf_hyperg_2F1_e
Date: Thu, 30 Apr 2015 09:33:09 -0600
User-agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0

Brian, this is a known bug, but I forgot to comment out that test case in test_hyperg.c when I was working on this a while back. I just did a commit which should fix the issue for you


On 04/30/2015 08:23 AM, Brian Gladman wrote:
When building with MSVC, I am now seing a single test failure:

FAIL: gsl_sf_hyperg_2F1_e(3.23191, -4.0229, 8.02291, 0.5, &r) [2115]
   unexpected return code: 11
   4.300243900348178494e-01  2.655871889646902615e-06
FAIL: Hypergeometric Functions [2144]

with an unexpected return code of 11, indicating that the maximum number
of iterations have been exceeded.

Changing the number of iterations in the loop that compiles the series
sum makes no difference, nor does changing the floating point model used
to compile the library.

The value returned doesn't look too bad when compared with the value
Mathematica gives:

gsl: 0.430024390034817|8494
mm:  0.430024390034817|064619266095678

so I am wondering if anyone has any bright ideas on what I might be able
to do about this.

    best regards,

      Brian Gladman

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