#8498: bug in has_good_reduction for a point on an elliptic curve over a number
field
-------------------------------+--------------------------------------------
Reporter: wuthrich | Owner: cremona
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.4
Component: elliptic curves | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Jean Gillibert reported me the following bug. Define
{{{
E = EllipticCurve('11a1')
K.<t> = NumberField(x^2+47)
EK = E.base_extend(K)
T = EK(5,5)
P = EK(-2, -1/2*t - 1/2)
p = K.ideal(11)
}}}
Then the following works fine
{{{
sage: T.has_good_reduction(p)
False
}}}
but not this one :
{{{
P.has_good_reduction(p)
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8498>
Sage <http://www.sagemath.org>
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