#10963: More functorial constructions
-------------------------------------+-------------------------------------
Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.13
Component: categories | Resolution:
Keywords: | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues:
Dependencies: #11224, #8327, | Commit:
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394 |
-------------------------------------+-------------------------------------
Comment (by SimonKing):
The lines around the error (line 6478) are
{{{
sage: E = EllipticCurve([0, 0, 1, -34874, -2506691])
sage: E.heegner_index(-8)
Traceback (most recent call last):
...
RuntimeError: ...
}}}
Hence, we test against a runtime error with unspecified error message. Let
us see which, and let us test the memory consumption.
First, with the branch from #13394:
{{{
sage: get_memory_usage()
190.30078125
sage: E = EllipticCurve([0, 0, 1, -34874, -2506691])
sage: get_memory_usage()
190.7265625
sage: E.heegner_index(-8)
Unable to compute the rank with certainty (lower bound=0).
This could be because Sha(E/Q)[2] is nontrivial.
Try calling something like two_descent(second_limit=13) on the
curve then trying this command again. You could also try rank
with only_use_mwrank=False.
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
...
RuntimeError: Rank not provably correct.
sage: get_memory_usage()
193.0625
}}}
Now, with my local branch that I've created for the patch from here:
{{{
sage: get_memory_usage()
191.50390625
sage: E = EllipticCurve([0, 0, 1, -34874, -2506691])
sage: get_memory_usage()
191.6328125
sage: E.heegner_index(-8)
...
RuntimeError: Rank not provably correct.
sage: get_memory_usage()
194.25390625
}}}
So, it seems that the memory consumption has just increased by a constant
amount. Also note that
{{{
ulimit -v 2300000; ./sage -t --long
src/sage/schemes/elliptic_curves/heegner.py
Running doctests with ID 2013-11-04-23-46-03-6fbd5fa5.
Doctesting 1 file.
sage -t --long src/sage/schemes/elliptic_curves/heegner.py
[1072 tests, 104.05 s]
----------------------------------------------------------------------
All tests passed!
----------------------------------------------------------------------
Total time for all tests: 106.1 seconds
cpu time: 97.4 seconds
cumulative wall time: 104.0 seconds
}}}
works for me. I'll try to decrease the memory limit.
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:155>
Sage <http://www.sagemath.org>
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