#18589: isogeny efficiency improvement
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Reporter: | Owner:
cremona | Status: needs_review
Type: | Milestone: sage-6.8
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers:
elliptic curves | Work issues:
Keywords: | Commit:
isogeny | ad56369f5def8060575b6567342dedb28a447293
Authors: John | Stopgaps:
Cremona |
Report Upstream: N/A |
Branch: |
u/cremona/18589 |
Dependencies: |
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Comment (by cremona):
Replying to [comment:37 jdemeyer]:
> Replying to [comment:34 cremona]:
> > Its computation is short, and its factoring takes < 1 hour.
> Then why did the computation of the isogenies without this patch take
days? What was the bottleneck? I find it hard to believe that the calls to
`mult()` can take so much time.
Me too, but as I tried to explain the script I was running was computing
the isogeny class many times. I am rerunning just E.isogeny_class() under
6.7 now and will report back (but this ticket need not wait).
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Ticket URL: <http://trac.sagemath.org/ticket/18589#comment:40>
Sage <http://www.sagemath.org>
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