#4965: [with patch, needs work] Z/nZ[x] via FLINT's zmod_poly
------------------------------+---------------------------------------------
Reporter: malb | Owner: somebody
Type: defect | Status: new
Priority: major | Milestone: sage-3.4
Component: basic arithmetic | Resolution:
Keywords: |
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Comment (by malb):
{{{
File ".../sage/schemes/elliptic_curves/ell_number_field.py", line 728:
sage: EllipticCurve([1 + a , -1 + a , 1 + a , -11 + a , 5 -9*a
]).conductor()
Exception raised:
Traceback (most recent call last):
File ".../sage/schemes/elliptic_curves/ell_number_field.py", line
747, in conductor
for d in self.local_data()],\
File ".../sage/schemes/elliptic_curves/ell_number_field.py", line
396, in local_data
return [self._get_local_data(pr, proof) for pr in primes]
File ".../sage/schemes/elliptic_curves/ell_number_field.py", line
418, in _get_local_data
self._local_data[P] = EllipticCurveLocalData(self, P, proof)
File ".../schemes/elliptic_curves/ell_local_data.py", line 140, in
__init__
self._Emin, ch, self._val_disc, self._fp, self._KS, self._cp,
self._split = self._tate(proof)
File ".../sage/schemes/elliptic_curves/ell_local_data.py", line 520,
in _tate
r = proot(-b6, 3)
File ".../sage/schemes/elliptic_curves/ell_local_data.py", line 451,
in <lambda>
proot = lambda x,e: F.lift(F(x).nth_root(e, extend = False, all =
True)[0])
File "integer_mod.pyx", line 855, in
sage.rings.integer_mod.IntegerMod_abstract.nth_root
(sage/rings/integer_mod.c:7712)
File "polynomial_element.pyx", line 3715, in
sage.rings.polynomial.polynomial_element.Polynomial.roots
(sage/rings/polynomial/polynomial_element.c:24924)
File "polynomial_element.pyx", line 2096, in
sage.rings.polynomial.polynomial_element.Polynomial.factor
(sage/rings/polynomial/polynomial_element.c:15667)
ValueError: factorization of 0 not defined
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4965#comment:4>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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