#10682: sum fails with lower bound != 0 or 1 (upgrade maxima to 5.26)
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Reporter: fmaltey | Owner:
burcin
Type: defect | Status:
needs_work
Priority: critical | Milestone:
sage-5.0
Component: symbolics | Keywords:
maxima 5.26.0 binomial sum
Work_issues: domain issue, error handling in nintegral | Upstream: N/A
Reviewer: Jean-Pierre Flori, | Author:
Dima Pasechnick
Merged: | Dependencies:
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Comment(by mjo):
Replying to [comment:45 nbruin]:
> desolve: I think Dima's new approach is acceptable in that it both fixes
the doctest and documents the regression. Did anybody ever check if the
returned solution with `domain: complex` is actually correct with some
crazy combination of branch cut choices?
It fixes the doctest in the same way that deleting the doctest fixes the
doctest.
All we have to do to fix ''this'' ticket is backport simplify_sum.mac:
{{{
sage: maxima.version()
'5.24.0'
sage: n,k = var('n,k')
sage: sum(binomial(n,k)*k^2, k, 2, n)
1/4*(n^2 + n)*2^n - n
}}}
If we're going to upgrade maxima after that, we should do it properly,
i.e. no regressions.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10682#comment:46>
Sage <http://www.sagemath.org>
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