[Boost-bugs] [Boost C++ Libraries] #9927: Bug in zero's finding of bessel functions

Subject: [Boost-bugs] [Boost C++ Libraries] #9927: Bug in zero's finding of bessel functions
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-04-18 20:30:26

#9927: Bug in zero's finding of bessel functions
-------------------------------------+-------------------------
 Reporter:  Peter Zwart <PHZwart@…>  |      Owner:  johnmaddock
     Type:  Bugs                     |     Status:  new
Milestone:  To Be Determined         |  Component:  math
  Version:  Boost 1.55.0             |   Severity:  Problem
 Keywords:  special functions        |
-------------------------------------+-------------------------
 The zero finding routine for cylindrical bessel functions gives incorrect
 values for a large number of nodes for a variety of orders. Examples are

 order = 3/2, first zero. Reported at 8.3825 but should be at 8.1825, i.e.
 0.2 lower. I check refined all first 100 zeros up to order 100+1/2 using a
 golden section search against a spherical bessel function. Where there are
 errors, they are always 0.2.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/9927>
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