Re: [Boost-bugs] [Boost C++ Libraries] #11395: boost::math::beta not working for large a, b values

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11395: boost::math::beta not working for large a, b values
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-06-15 07:53:37

#11395: boost::math::beta not working for large a,b values
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  Reporter:  Oli Quinet <quinet.olivier@…>  |      Owner:  johnmaddock
      Type:  Patches                        |     Status:  new
 Milestone:  To Be Determined               |  Component:  math
   Version:  Boost 1.57.0                   |   Severity:  Problem
Resolution:                                 |   Keywords:
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Comment (by johnmaddock):

 Thanks for the report.

 Can you give me a concrete example that underflows too soon?  I'm having
 trouble finding one testing random values.

 Adding lbeta may well be useful: although in your example I would expect
 cancellation errors to dominate for large arguments.  You could also break
 the expression down into lgamma calls - if the arguments are related you
 well get a lot of algebraic simplification that way too?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11395#comment:1>
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