#21054: Transition between bases is incorrect for Moebius algebras
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Reporter: jmantysalo | Owner:
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-7.3
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Travis Scrimshaw | Reviewers: Darij Grinberg
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/combinat/fix_moebius_algebra_multiplication-21054|
e5e590392fcd641b3aa7946c63bc27a6ed5fbfd9
Dependencies: | Stopgaps:
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Changes (by tscrim):
* priority: major => critical
Comment:
They are indirectly exposed to the user through `coerce_map_from`.
However, it is (mathematically) correct that they are triangular wrt the
poset order. It just might happen that someone gives a very horrible poset
that is a facade. However, that is an independent issue than what is fixed
here, which really should get into 7.3 because it gives wrong answers, so
it belongs on a separate ticket.
--
Ticket URL: <https://trac.sagemath.org/ticket/21054#comment:14>
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