#11683: ell_curve_isogeny initialization
-------------------------------+--------------------------------------------
   Reporter:  saraedum         |          Owner:  cremona                       
     
       Type:  enhancement      |         Status:  needs_review                  
     
   Priority:  minor            |      Milestone:  sage-4.8                      
     
  Component:  elliptic curves  |       Keywords:  startup, initialization, 
sd32, sd35
Work_issues:                   |       Upstream:  N/A                           
     
   Reviewer:                   |         Author:  Julian Rueth, John Cremona    
     
     Merged:                   |   Dependencies:                                
     
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Changes (by saraedum):

  * keywords:  startup, initialization, sd32 => startup, initialization,
               sd32, sd35


Comment:

 Replying to [comment:14 cremona]:
 > I can now compute the generic kernels in negligible time for l=2,3,5,7
 and only 18s for l=13 (compared to over 10 hours!).  If people think it is
 worth it I will revise the patch accordingly.  Then we can test 2,3,5,7
 every time and l=13 with a # long time tag.

 Just a remark, it seems sage improved quite a bit on the underlying
 computation. It is quite a bit faster than 13 hours (that is what the
 docstring says) already:
 {{{
 sage: time a,b=Psi(13, use_stored=True),Psi(13, use_stored=False)
 Time: CPU 178.47 s, Wall: 178.51 s
 sage: a==b
 True
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11683#comment:15>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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