#4453: elliptic curves -- heegner_index command gives nonsense when rank > 1
-------------------------------+--------------------------------------------
Reporter: was | Owner:
Type: defect | Status: needs_work
Priority: minor | Milestone: sage-4.5.3
Component: elliptic curves | Keywords:
Author: William Stein | Upstream: N/A
Reviewer: John Cremona | Merged:
Work_issues: |
-------------------------------+--------------------------------------------
Changes (by newvalueoldvalue):
* status: positive_review => needs_work
* reviewer: cremona => John Cremona
* milestone: sage-4.5.2 => sage-4.5.3
* work_issues: rebase against Sage 4.3.3.alpha0 =>
* author: was => William Stein
Comment:
With the forthcoming 4.5.2 (4.5.2.rc0 + #9226) and the rebased patch, I
get a doctest failure:
{{{
#!python
sage -t -long "devel/sage/sage/schemes/elliptic_curves/heegner.py"
**********************************************************************
File
"/mnt/usb1/scratch/mpatel/apps/sage-4.5.2/devel/sage/sage/schemes/elliptic_curves/heegner.py",
line 6465:
sage: E.heegner_index(-8, descent_second_limit=16)
Exception raised:
Traceback (most recent call last):
File
"/mnt/usb1/scratch/mpatel/apps/sage-4.5.2/local/bin/ncadoctest.py", line
1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File
"/mnt/usb1/scratch/mpatel/apps/sage-4.5.2/local/bin/sagedoctest.py", line
38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File
"/mnt/usb1/scratch/mpatel/apps/sage-4.5.2/local/bin/ncadoctest.py", line
1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_229[14]>", line 1, in <module>
E.heegner_index(-Integer(8),
descent_second_limit=Integer(16))###line 6465:
sage: E.heegner_index(-8, descent_second_limit=16)
File "/mnt/usb1/scratch/mpatel/apps/sage-4.5.2/local/lib/python
/site-packages/sage/schemes/elliptic_curves/heegner.py", line 6485, in
heegner_index
if check_rank and self.rank() >= 2:
File "/mnt/usb1/scratch/mpatel/apps/sage-4.5.2/local/lib/python
/site-packages/sage/schemes/elliptic_curves/ell_rational_field.py", line
1741, in rank
raise RuntimeError, 'Rank not provably correct.'
RuntimeError: Rank not provably correct.
**********************************************************************
1 items had failures:
1 of 21 in __main__.example_229
***Test Failed*** 1 failures.
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4453#comment:8>
Sage <http://www.sagemath.org>
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