#15767: Upgrade PARI to 2.7.1
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.3
Component: packages: | Resolution:
standard | Merged in:
Keywords: | Reviewers:
Authors: Jeroen Demeyer | Work issues:
Report Upstream: N/A | Commit:
Branch: | e5bdf4ccc2bab46b98c096e3cbb15dd0f942623e
u/jdemeyer/ticket/15767 | Stopgaps:
Dependencies: #15888, #15855 |
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Comment (by pbruin):
The other remaining failure on 32-bit (see comment:94) is in the following
doctest (in `ell_number_field.py`, introduced in #15483):
{{{
sage: K.<s> = QuadraticField(229)
sage: c4 = 2173 - 235*(1 - s)/2
sage: c6 = -124369 + 15988*(1 - s)/2
sage: E = EllipticCurve([-c4/48, -c6/864])
sage: E.simon_two_descent()
(0, 0, [])
}}}
This returns `(1, 1, [])` on 32-bit because a certain quartic is
incorrectly determined to be locally soluble at infinity. It appears to
be caused by `polsturm` being called on a polynomial whose precision is
too low. This bug is similar to but different than the one in #15483, and
seems somewhat harder to fix.
--
Ticket URL: <http://trac.sagemath.org/ticket/15767#comment:103>
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