#9322: bug in simon_two_descent for elliptic curves
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Reporter: cremona | Owner: AlexGhitza
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.5
Component: elliptic curves | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by jeremywest):
* cc: jeremywest (added)
* status: new => needs_work
* component: algebra => elliptic curves
* milestone: => sage-4.5
Comment:
I also noticed this same problem, although it seems to be nearly
ubiquitous for number fields. I found it for several quadratic and cubic
extensions as well as for a degree seven extension. For one I got an index
out of bounds error which I believe originates because gp does not hand
back the results expected by the sage script. For the rest I found that
the sage script was attempting to coerce a point from one curve to another
and it reports that the point does not lie on the curve.
Unfortunately, I don't currently have access to sage so I am unable to
report line numbers. The problem occurs in
sage/schemes/elliptic_curves/gp_simon.py near the bottom of the only
function defined.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9322#comment:2>
Sage <http://www.sagemath.org>
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