#15667: Time anomaly in finding orders of points on an elliptic curve over a
finite
field
-------------------------------------+-------------------------------------
Reporter: cremona | Owner:
Type: defect | Status: positive_review
Priority: major | Milestone: sage-6.2
Component: elliptic curves | Resolution:
Keywords: point order | Merged in:
finite field | Reviewers: Jean-Pierre Flori
Authors: John Cremona | Work issues:
Report Upstream: N/A | Commit:
Branch: | c5c2d0c78863349d959609df700decbff9dc43fe
u/jpflori/ticket/15667 | Stopgaps:
Dependencies: |
-------------------------------------+-------------------------------------
Comment (by vbraun):
Doctest failure:
{{{
**********************************************************************
File "src/sage/groups/generic.py", line 77, in sage.groups.generic
Failed example:
linear_relation(P,Q,'+')
Exception raised:
Traceback (most recent call last):
File "/home/release/Sage/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 480, in _run
self.execute(example, compiled, test.globs)
File "/home/release/Sage/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 839, in execute
exec compiled in globs
File "<doctest sage.groups.generic[26]>", line 1, in <module>
linear_relation(P,Q,'+')
File "/home/release/Sage/local/lib/python2.7/site-
packages/sage/groups/generic.py", line 996, in linear_relation
n = P.order()
File "/home/release/Sage/local/lib/python2.7/site-
packages/sage/schemes/elliptic_curves/ell_point.py", line 3528, in order
N = generic.order_from_multiple(self, M, plist, operation='+')
File "/home/release/Sage/local/lib/python2.7/site-
packages/sage/groups/generic.py", line 1103, in order_from_multiple
assert multiple(P,M,operation=operation) == identity
AssertionError
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/15667#comment:5>
Sage <http://www.sagemath.org>
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