#12509: computation of height of point on elliptic curve over Q(sqrt(5)) is
WRONG
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Reporter: was | Owner: was
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-5.6
Component: elliptic curves | Resolution:
Keywords: heights | Work issues:
Report Upstream: N/A | Reviewers: Peter Bruin
Authors: John Cremona | Merged in:
Dependencies: | Stopgaps: #12692
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Comment (by cremona):
Thanks: your second point is that while we still work in double the
precision, the number of terms needed can be computed from the original
precision? That makes sense.
On the second point, it is certainly possible that the user asks for two
different things by using a low-precision embedding but then asking for a
higher precision without refining the embedding. I would fix this by
first replacing v (if necessary) by a refinement to precision "prec".
Which may be what you patch does, so I should look at it.... and indeed
that is what you do.
The second patch looks good to me, hope the tests pass!
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12509#comment:12>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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