#18662: Implement (semi-)global minimal models for elliptic curves over number
fields with h>1
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Reporter: cremona | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.8
Component: elliptic curves | Resolution:
Keywords: Weierstrass | Merged in:
models | Reviewers:
Authors: John Cremona | Work issues:
Report Upstream: N/A | Commit:
Branch: | 4dc4d86b76a32a53c2e5cddb6711a5c2d2c673be
u/cremona/ticket/18662 | Stopgaps:
Dependencies: |
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Changes (by cremona):
* status: needs_work => needs_review
Comment:
The last commit applied the global minimal model reduction to the codomain
of any isogeny over a number field (previously this was done over QQ
only), which resulted in a lot of doctest changes, not just the changes of
models but the resulting reordering of the curves in an isogeny class
(which has no implicit meaning and s done using lexicographic order on the
a-invariants). This most of the changes in this last commit are trivial.
However one of the high degree examples in ell_number_field now takes too
long. Either that example now has to be removed (not tested), or we
should make this automatic minimization just an option. Still, the code
needs review.
--
Ticket URL: <http://trac.sagemath.org/ticket/18662#comment:6>
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