Thanks for your report. If you manage to fix some of these cases, we are
happy to accept a patch
On 09/19/2014 10:17 AM, Patrick Alken wrote:
URL:
<http://savannah.gnu.org/bugs/?43258>
Summary: confluent hypergeometric functions
Project: GNU Scientific Library
Submitted by: psa
Submitted on: Fri 19 Sep 2014 04:17:55 PM GMT
Category: Runtime error
Severity: 3 - Normal
Operating System:
Status: None
Assigned to: None
Open/Closed: Open
Release:
Discussion Lock: Any
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Details:
From raymond dot rogers72 =at= gmail dot com
If you will check you will find that
hyperg_U.c fails for U(a,a-1,1) a>5
hyperg_U.c fails for U(2,b,1) for b< -2 (with occasional holes due to
rounding)
These can be checked through gsl-shell, gsl-shell-gui, or I have a
command line interface.
I believe there is a choke point for the error at the start of
hyperg_U_series. There are a couple of sources to it and a couple of
crashes afterwards. A fix should be 13.2.8 in DLMF. I would like to
discuss this with somebody who has experience with this code before I
spend much time on the fix.
This should also fix a couple of "unimplemented cases"
I also have a spreadsheet and program comparing test cases from GSL,
mpmath, and DAMath; for Confluent Hypergeometric tests. Not complete
yet but it 700 (or so) instances.
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