Re: [Boost-bugs] [Boost C++ Libraries] #4879: Apparent bugs in ibeta_inv_imp (math::specialfunctions)

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4879: Apparent bugs in ibeta_inv_imp (math::specialfunctions)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-11-22 16:30:59

#4879: Apparent bugs in ibeta_inv_imp (math::specialfunctions)
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  Reporter:  charles.southey@…               |       Owner:  johnmaddock
      Type:  Bugs                            |      Status:  new        
 Milestone:  To Be Determined                |   Component:  math       
   Version:  Boost 1.44.0                    |    Severity:  Problem    
Resolution:                                  |    Keywords:             
---------------------------------------------+------------------------------

Comment (by anonymous):

 I believe you're correct on both counts - using r for the conditional
 agrees with my notes - and setting invert = !invert is a safer approach
 than we have now - it looks like this got broken when we added another
 inversion method as an optimisation which broke the invert == false
 precondition - looks like the issue can only be triggered when a == 0.5
 and b < 0.5 - does this ring a bell?

 John Maddock

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/4879#comment:1>
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