#12254: __cmp__ for torsion subgroups of elliptic curves is too weak.
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Reporter: was | Owner: davidloeffler
Type: defect | Status: new
Priority: minor | Milestone: sage-5.0
Component: number fields | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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At the elliptic curve workshop, many people were disturbed by this:
{{{
sage: E = EllipticCurve('11a')
sage: E.torsion_subgroup() == AdditiveAbelianGroup([5])
}}}
The problem is that equality is just comparing invariants.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12254>
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