#15397: Bug in product of Schur symmetric functions
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Reporter: zabrocki | Owner:
Type: defect | Status: new
Priority: critical | Milestone: sage-5.13
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: Reported upstream. Developers | Work issues:
acknowledge bug. | Commit:
Branch: | Stopgaps:
Dependencies: |
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Comment (by zabrocki):
I don't see the fix for symmetrica. There is clearly a bug there that one
can recreate on their website.
The attached patch changes `_multiply` to `_multiply_basis` and then calls
`lrcalc.mult`. I believe that given what the former `_multiply` function
did, it should have been a `_multiply_basis` all along. I also added
three doctests.
That does not mean that the bug in symmetrica should not be fixed. The
following command causes a `Segmentation fault`
{{{
sage: symmetrica.mult_schur_schur([125],[3])
}}}
My recommendation is to review this patch and move on to fixing the
problems with lrcalc mentioned in #14625. Anders Buch has a version 1.1.7
of lrcalc while the version in Sage now is 1.1.6.
--
Ticket URL: <http://trac.sagemath.org/ticket/15397#comment:15>
Sage <http://www.sagemath.org>
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