[Bug-gsl] [bug #53905] Bug in Hypergeometric function

[Patrick Alken]

URL:
  <http://savannah.gnu.org/bugs/?53905>

                 Summary: Bug in Hypergeometric function
                 Project: GNU Scientific Library
            Submitted by: psa
            Submitted on: Mon 14 May 2018 09:41:03 PM UTC
                Category: None
                Severity: 3 - Normal
        Operating System: 
                  Status: None
             Assigned to: None
             Open/Closed: Open
                 Release: 
         Discussion Lock: Any

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Details:

from kamran =dot= salehivaziri =at= epfl =dot= ch

Dear Sir or Madam,


Let me first thank you for your amazing package that is very well-written with
a nice documentation.


I am using your package "gsl" for c++/c to calculate Integrals of
Hypergeometric functions. I have trouble getting output for Hypergeometric
function themselves.


To be precise your code gives error for the value of "gsl_sf_hyperg_2F1(-10, 2
, 0.5 , 0.5)".


I tried to change the components a little bit and I understood that your code
works down to a=-10 but after that it gives an error. I also check from Python
and Mathematica and there is a finite value for this function(0.0778324).


Would you please respond to my e-mail since I was spending two days to debug
this and now I get to this point. ?





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