#6384: [with patch, needs review] elliptic curve -- isogeny function is not
robust
-- it doesn't check validity of its input
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Reporter: was | Owner: shumow
Type: defect | Status: new
Priority: major | Milestone: sage-4.1
Component: number theory | Keywords: elliptic curves, isogeny,
Reviewer: | Author:
Merged: |
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Comment(by wuthrich):
The patch was exported agains 4.1.alpha3.
In the end it took my quite a lot of work to correct this due to the
(unnecessary) complexity of this file. I changed
* one can now give a single point or a list of points as the kernel
argument. The isogeny has kernel generated by these points.
* it checks now if the points are torsion points and, when a polynomial is
given, that it divides the correct division polynomial.
* and i changed the documentation slightly.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6384#comment:7>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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