#7935: local_data for elliptic curves over number fields
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Reporter: wuthrich | Owner: cremona
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.3.1
Component: elliptic curves | Keywords: elliptic curve, number fields,
local data, tamagawa
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
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Comment(by cremona):
OK, I agree that there was a sign error... The value of e in the code is
always negative (since we skip if a is integral, hence at least one of the
fractions (which are rounded down by the "/" operator) is negative. Hence
we divide by a negative power of pi, i.e. multiply by a positive power, so
haveing pi integral is exactly what you want. You win!
Sorry, it's 5.30 on a Friday after the first week of term.
On the T. products, can we come up with a different name for one of the
functions since they don't agree? Either that, of have an optional
parameter in the case over Q to give the same value as if Q were treated
as a number field?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7935#comment:7>
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