#20747: LatticePoset: add is_meet_semidistributive
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-7.3
Component: combinatorics | Resolution:
Keywords: | Merged in:
Authors: Jori Mäntysalo | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jmantysalo/latticeposet__add_is_meet_semidistributive|
83272022009539e57cc7ac18188d719676263e1b
Dependencies: | Stopgaps:
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Comment (by jmantysalo):
Replying to [comment:3 tscrim]:
> Wouldn't this test
> {{{#!python
> if self._hasse_diagram.size() > n*log(n, 2)/2:
> return False
> }}}
> be better done in the `HasseDiagram.is_semidistributive`, so all methods
which call it benefit?
The function at `hasse_diagram.py` does not return a Boolean, but `None`
or a tuple instead. It is meant to be extendable at later time.
--
Ticket URL: <http://trac.sagemath.org/ticket/20747#comment:4>
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