#13593: tighter upper bound on elliptic curve rank
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Reporter: ohanar | Owner: cremona
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.1
Component: elliptic curves | Resolution:
Keywords: | Merged in:
Authors: R. Andrew Ohana, | Reviewers:
Chris Wuthrich | Work issues:
Report Upstream: N/A | Commit:
Branch: | 9a069c7225480773cd6429e87f10bf5d0d8855e0
u/wuthrich/ticket/13593 | Stopgaps:
Dependencies: |
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Changes (by wuthrich):
* priority: minor => major
Old description:
> The current upper bound in `rank_bounds` do not take into account two
> torsion. This corrects this and thus gives a tighter upper bound.
>
> ----
>
> Apply attachment:trac13593.patch.
New description:
The current upper bound in `rank_bounds` do not take into account two
torsion. This corrects this and thus gives a tighter upper bound.
--
Comment:
... and then I spotted that the list may contain points of order 2. the
second commit filters the torsion points out of the list.
--
Ticket URL: <http://trac.sagemath.org/ticket/13593#comment:9>
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