#13413: fix integer overflow (?) in conversion of powersums to Schur functions
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Reporter: saliola | Owner: sage-
Type: defect | combinat
Priority: critical | Status:
Component: combinatorics | needs_review
Keywords: symmetric functions, | Milestone: sage-5.13
symmetrica, memleak | Resolution:
Authors: Jeroen Demeyer | Merged in:
Report Upstream: Reported upstream. No | Reviewers:
feedback yet. | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by zabrocki):
So I ran on an old copy of sage (no correction installed) on the same
linux machine:
{{{
sage: s = SymmetricFunctions(QQ).s()
sage: p = SymmetricFunctions(QQ).p()
sage: g = s(p([1]*47))
sage: s(p([1]*5))
s[1, 1, 1, 1, 1] + 4*s[2, 1, 1, 1] + 5*s[2, 2, 1] + 6*s[3, 1, 1] + 5*s[3,
2] + 4*s[4, 1] + s[5]
}}}
On an old copy of sage on mac (correction installed or not):
{{{
sage: s = SymmetricFunctions(QQ).s()
sage: p = SymmetricFunctions(QQ).p()
sage: g = s(p([1]*47))
sage: s(p([1]*5))
s[1, 1, 1, 1, 1] - 1004621421*s[2, 1, 1, 1] - 2015815354*s[2, 2, 1] -
2018818386*s[3, 1, 1] - 2013245610*s[3, 2] - 1015866049*s[4, 1] + s[5]
}}}
This means that there are two (at least partially) independent problems
going on here. One of them does not seem to appear on linux machines.
When I run the examples in the patch description, I do not see the random
coefficients in the expansion of `s(p([2,2]))`. Do you see it on boxen?
--
Ticket URL: <http://trac.sagemath.org/ticket/13413#comment:47>
Sage <http://www.sagemath.org>
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