#10999: E.integral_points has a bug
-------------------------------+--------------------------------------------
Reporter: gagansekhon | Owner: cremona
Type: defect | Status: new
Priority: minor | Milestone: sage-4.7
Component: elliptic curves | Keywords: Cremona database, integral
points, gens
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
-------------------------------+--------------------------------------------
After installing the large cremona database. The following code produces
an error.
{{{
E=EllipticCurve('389a1')
G=E.gens()
P1=E.point((-1,1,1))
P2=E.point((0,0,1))
print E.integral_points([P1,P2])
print E.integral_points(G)
}}}
[(-2 : 0 : 1), (-1 : 1 : 1), (0 : 0 : 1), (1 : 0 : 1), (3 : 5 : 1), (4 : 8
: 1), (6 : 15 : 1), (39 : 246 : 1), (133 : 1539 : 1), (188 : 2584 : 1)]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_3.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8
-*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("RT1FbGxpcHRpY0N1cnZlKCczODlhMScpCkc9RS5nZW5zKCkKUDE9RS5wb2ludCgoLTEsMSwxKSkKUDI9RS5wb2ludCgoMCwwLDEpKQpwcmludCBFLmludGVncmFsX3BvaW50cyhbUDEsUDJdKQpwcmludCBFLmludGVncmFsX3BvaW50cyhHKQ=="),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File
"/private/var/folders/rt/rtyQ7RPsHRCDmvOBf9SYwU+++TI/-Tmp-/tmpwbmbeK/___code___.py",
line 8, in <module>
exec compile(u'print E.integral_points(G)
File "", line 1, in <module>
File "/Users/sekhon/Documents/sage-4.7.alpha2/local/lib/python2.6/site-
packages/sage/schemes/elliptic_curves/ell_rational_field.py", line 5310,
in integral_points
raise ValueError, "points are not on the correct curve"
ValueError: points are not on the correct curve
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10999>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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