#9758: implement Watkins-Delaunay's algorithm for computing modular degrees in
Sage
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Reporter: was | Owner: was
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.4
Component: number theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by cremona):
Here's one case which can be used for testing (I have correspondence with
Mark Watkins which explains the problem and how to fix it, and will open a
new ticket for that):
{{{
sage: E = EllipticCurve([1,-1,0,-318360868065,-69208434591226115])
sage: E.modular_degree(algorithm='magma')
2417135616
}}}
but
{{{
sage: E = EllipticCurve([1,-1,0,-318360868065,-69208434591226115])
sage: E.modular_degree()
# boom
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9758#comment:5>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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