[Scipy-tickets] [SciPy] #1296: associated legendre polynomials in scipy.special fail for calculations with degree higher than approx. 22

SciPy Trac scipy-tickets@scipy....
Sun Oct 10 10:18:01 CDT 2010


#1296: associated legendre polynomials in scipy.special fail for calculations with
degree higher than approx. 22
------------------------------+---------------------------------------------
 Reporter:  josip.mihaljevic  |       Owner:  pv   
     Type:  defect            |      Status:  new  
 Priority:  high              |   Milestone:  0.9.0
Component:  scipy.special     |     Version:  0.7.0
 Keywords:  legendre          |  
------------------------------+---------------------------------------------

Comment(by pv):

 Ok, the regularized `hyp2f1` wasn't difficult to do.

 http://github.com/pv/scipy-work/compare/master...feat/hyp2f1-regularized

 Cancellations at x -> +-1 probably still make the `hyp2f1` expression for
 the associated polynomial too cumbersome to use, so it would probably be
 best to still use a special algorithm for `lpmv`.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/1296#comment:4>
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