#11346: major bug in the conductor function for elliptic curves over number
fields
-------------------------------+--------------------------------------------
Reporter: was | Owner: cremona
Type: defect | Status: positive_review
Priority: critical | Milestone: sage-4.7.1
Component: elliptic curves | Keywords:
Work_issues: | Upstream: N/A
Reviewer: Robert Bradshaw | Author: William Stein
Merged: | Dependencies:
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Changes (by newvalueoldvalue):
* reviewer: => Robert Bradshaw
* author: => William Stein
Comment:
Additional comment on this and #11347. I think a better fix would have
been to add one line in the constructor for {{{EllipticCurveLocalData}}}
in sage.schemes.elliptic_curves.ell_local_data, namely
{{{
E = E.integral_model()
}}}
rather than having a lot of separate functions have to remember to do
this. The fixes here and at #11347 are fine by themselves, but it remains
the case that
{{{
sage: K.<g> = NumberField(x^2 - x - 1)
sage: E = EllipticCurve(K,[0,0,0,-1/48,161/864])
sage: E.local_data()
}}}
fails.
I don't have time to rework this right now, so have not tagged this "needs
work"...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11346#comment:4>
Sage <http://www.sagemath.org>
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