#19229: Bug in elliptic curve Galois Representation
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Reporter: cremona | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.9
Component: elliptic curves | Resolution:
Keywords: Galois | Merged in:
representations | Reviewers:
Authors: John Cremona | Work issues:
Report Upstream: N/A | Commit:
Branch: u/cremona/19229 | df3d3f7c5819198be47c0f3dc8d7419066cee34c
Dependencies: | Stopgaps:
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Changes (by cremona):
* status: new => needs_review
Comment:
Fixed as follows: on construction of the GaloisRepresentation object the
CM status of the elliptic curve is assessed and cached. This enables some
cleaning of the code later where we never have to rely on the raising of
exceptions to catch situations which only happen in the CM case. This
does not in itself fix the bug, we just get a different error, so the
second fix is to make the variable name of a number field constructed on
one function not clash.
Appropriate doctests added here and in the docstring for
E.isogeny_class().
--
Ticket URL: <http://trac.sagemath.org/ticket/19229#comment:4>
Sage <http://www.sagemath.org>
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