[Boost-bugs] [Boost C++ Libraries] #9512: trivial bug: sign change for negative values in bessel_i1

Subject: [Boost-bugs] [Boost C++ Libraries] #9512: trivial bug: sign change for negative values in bessel_i1
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-12-20 12:51:30

#9512: trivial bug: sign change for negative values in bessel_i1
-----------------------------------------+-------------------------
 Reporter:  Cornelia Strauß <strauss@…>  |      Owner:  johnmaddock
     Type:  Bugs                         |     Status:  new
Milestone:  To Be Determined             |  Component:  math
  Version:  Boost 1.55.0                 |   Severity:  Problem
 Keywords:                               |
-----------------------------------------+-------------------------
 The function `bessel_i1()` in
 `boost/math/special_functions/detail/bessel_i1.hpp` ends with the
 following code:

 {{{#!python
 if (x < 0)
 {
     value *= -value;                 // odd function
 }
 return value;
 }}}

 Instead of taking the square root, only the sign of `value` should be
 changed:

 {{{#!python
 if (x < 0)
 {
     value *= -1;                 // odd function
 }
 return value;
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9512>
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