[Scipy-tickets] [SciPy] #1640: sph_jn returns false results for some orders/values

SciPy Trac scipy-tickets@scipy....
Wed Apr 11 13:16:07 CDT 2012


#1640: sph_jn returns false results for some orders/values
---------------------------+------------------------------------------------
 Reporter:  Anakinele      |       Owner:  pv         
     Type:  defect         |      Status:  new        
 Priority:  high           |   Milestone:  Unscheduled
Component:  scipy.special  |     Version:  0.9.0      
 Keywords:  sph_jn         |  
---------------------------+------------------------------------------------

Comment(by pv):

 The implementation for `sph_*` comes from specfun, which only implements a
 simple recurrence that seems to break down for large `x`. An asymptotic
 expansion should be added, or the relation to `jv` should be used.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1640#comment:2>
SciPy <http://www.scipy.org>
SciPy is open-source software for mathematics, science, and engineering.


More information about the Scipy-tickets mailing list