#6113: segfault in division_points and factoring torsion_polynomial
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Reporter: ncalexan | Owner:
Type: defect | Status:
closed
Priority: major | Milestone:
sage-4.6
Component: elliptic curves | Resolution:
fixed
Keywords: segfault division points torsion polynomial | Author:
Upstream: N/A | Reviewer:
Merged: | Work_issues:
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Changes (by cremona):
* status: new => closed
* resolution: => fixed
Comment:
In 4.6.alpha1:
{{{
sage: K.<a>=NumberField(x^2-x+22)
sage: sage: w=-13*a-14
sage: sage: E=EllipticCurve([0,0,0,0,-1728*w])
sage: sage: P1 = E.lift_x(-3*a-66)
sage: sage: P2 = E.lift_x((-21*a-93)/4)
sage: sage: P2.division_points(19)
[]
sage: g = P2.division_points(19, poly_only=True)
sage: g.roots()
[]
}}}
so this can be closed as fixed.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6113#comment:11>
Sage <http://www.sagemath.org>
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