#7930: strange bug for elliptic curves over number fields
-------------------------------+--------------------------------------------
Reporter: wuthrich | Owner: cremona
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.1
Component: elliptic curves | Keywords:
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
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Comment(by wuthrich):
More precisely it produces
{{{
Traceback (most recent call last):
File "", line 1, in <module>
File "/tmp/tmpJwKYhV/___code___.py", line 23, in <module>
da = EK.local_data()
File "", line 1, in <module>
File "/usr/local/sage/local/lib/python2.6/site-
packages/sage/schemes/elliptic_curves/ell_number_field.py", line 437, in
local_data
return [self._get_local_data(pr, proof) for pr in primes]
File "/usr/local/sage/local/lib/python2.6/site-
packages/sage/schemes/elliptic_curves/ell_number_field.py", line 487, in
_get_local_data
self._local_data[P, proof] = EllipticCurveLocalData(self, P, proof)
File "/usr/local/sage/local/lib/python2.6/site-
packages/sage/schemes/elliptic_curves/ell_local_data.py", line 159, in
__init__
self._Emin, ch, self._val_disc, self._fp, self._KS, self._cp,
self._split = self._tate(proof)
File "/usr/local/sage/local/lib/python2.6/site-
packages/sage/schemes/elliptic_curves/ell_local_data.py", line 704, in
_tate
cp = 1 + _pcubicroots(b, c, d)
File "/usr/local/sage/local/lib/python2.6/site-
packages/sage/schemes/elliptic_curves/ell_local_data.py", line 536, in
_pcubicroots
return sum([rr[1] for rr in PolynomialRing(F, 'x')([d, c, b,
1]).roots()],0)
File "parent.pyx", line 538, in sage.structure.parent.Parent.__call__
(sage/structure/parent.c:4956)
File "coerce_maps.pyx", line 82, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(sage/structure/coerce_maps.c:3109)
File "coerce_maps.pyx", line 77, in sage.structure.coerce_maps._call_
(sage/structure/coerce_maps.c:3000)
File "/usr/local/sage/local/lib/python2.6/site-
packages/sage/rings/polynomial/polynomial_ring.py", line 312, in
_element_constructor_
return C(self, x, check, is_gen, construct=construct, **kwds)
File "/usr/local/sage/local/lib/python2.6/site-
packages/sage/rings/polynomial/polynomial_element_generic.py", line 604,
in __init__
Polynomial_generic_dense.__init__(self, parent, x, check, is_gen)
File "polynomial_element.pyx", line 5111, in
sage.rings.polynomial.polynomial_element.Polynomial_generic_dense.__init__
(sage/rings/polynomial/polynomial_element.c:34951)
File "residue_field.pyx", line 975, in
sage.rings.residue_field.ResidueFiniteField_givaro.__call__
(sage/rings/residue_field.c:9062)
TypeError
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7930#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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