#18916: Use Kedlaya algorithm to count points on hyperelliptic curves
-------------------------------------+-------------------------------------
Reporter: jpflori | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.8
Component: number fields | Resolution:
Keywords: hyperelliptic | Merged in:
curves, matrix of Frobenius | Reviewers:
Authors: | Work issues:
Report Upstream: Fixed upstream, | Commit:
but not in a stable release. | 6a4e932eef76137b6856c3b84f2fe82de807cc3a
Branch: | Stopgaps:
u/kedlaya/use_kedlaya_algorithm_to_count_points_on_hyperelliptic_curves|
Dependencies: #20219 |
-------------------------------------+-------------------------------------
Changes (by kedlaya):
* upstream: Reported upstream. No feedback yet. => Fixed upstream, but not
in a stable release.
Comment:
Replying to [comment:18 kedlaya]:
> I'm having trouble getting the PARI code to work in characteristic 2,
but even in odd characteristic there seem to be some issues:
> {{{
> pari: T = ffinit(3, 2);
> pari: y = ffgen(T, 'y);
> pari: hyperellcharpoly(x^3 + y*x)
> *** at top-level: hyperellcharpoly(x^3
> *** ^--------------------
> *** hyperellcharpoly: bug in PARI/GP (Segmentation Fault), please
report.
> }}}
> Off to go report this upstream...
Bill Allombert reports that this particular issue (the one not in
characteristic 2) is fixed upstream:
{{{
commit 31253df93771c72e44c19c245dcf514822a3bdb4
Author: Bill Allombert <[email protected]>
Date: Fri Mar 11 12:38:30 2016 +0100
hyperellcharpoly: fix typo in ZXX_to_FpXC
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/18916#comment:20>
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