#16013: Update Cremona's table of elliptic curves to 340000
-------------------------------------+-------------------------------------
Reporter: cremona | Owner:
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-6.2
Component: packages: | Resolution:
optional | Merged in:
Keywords: elliptic curve | Reviewers:
database | Work issues:
Authors: John Cremona | Commit:
Report Upstream: N/A | ecae41937843a6cdadce8c27514ada6b798b4543
Branch: | Stopgaps:
u/cremona/ticket/16013 |
Dependencies: |
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Comment (by jdemeyer):
I am getting
{{{
sage -t --long src/sage/schemes/elliptic_curves/ell_number_field.py
**********************************************************************
File "src/sage/schemes/elliptic_curves/ell_number_field.py", line 2273, in
sage.schemes.elliptic_curves.ell_number_field.EllipticCurve_number_field.reduction.is_isogenous
Failed example:
E.is_isogenous(Ec)
Exception raised:
Traceback (most recent call last):
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 480, in _run
self.execute(example, compiled, test.globs)
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 839, in execute
exec compiled in globs
File "<doctest
sage.schemes.elliptic_curves.ell_number_field.EllipticCurve_number_field.reduction.is_isogenous[41]>",
line 1, in <module>
E.is_isogenous(Ec)
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/schemes/elliptic_curves/ell_number_field.py", line 2283, in
is_isogenous
if E1.change_ring(OP).cardinality() !=
E2.change_ring(OP).cardinality():
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/schemes/elliptic_curves/ell_generic.py", line 1256, in
base_extend
return constructor.EllipticCurve([R(a) for a in
self.a_invariants()])
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/schemes/elliptic_curves/constructor.py", line 359, in
EllipticCurve
return ell_finite_field.EllipticCurve_finite_field(x, y)
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/schemes/elliptic_curves/ell_finite_field.py", line 103, in
__init__
EllipticCurve_field.__init__(self, ainvs)
File "/usr/local/src/sage-git/local/lib/python2.7/site-
packages/sage/schemes/elliptic_curves/ell_generic.py", line 157, in
__init__
"Invariants %s define a singular curve."%ainvs
ArithmeticError: Invariants [0, 0, 0, 0, 0] define a singular curve.
**********************************************************************
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/16013#comment:4>
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