#19801: LatticePosets: Add pseudocomplements
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Reporter: jmantysalo | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.0
Component: combinatorics | Resolution:
Keywords: lattice | Merged in:
Authors: Jori Mäntysalo | Reviewers: Daniel Krenn
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jmantysalo/pseudocomplement | a9c00e2d691282e6d77a63827b2ada33ceaaeb6d
Dependencies: | Stopgaps:
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Changes (by jmantysalo):
* status: needs_work => needs_review
Comment:
1) Changed. 2) Done. I added it to both functions, I guess it makes no
harm. 5) Of course, corrected.
4) Yes. And in any case `x={1:[2,3]}; x` outputs `{1: [2, 3]}` so it makes
sense.
3) Yep, for example `top()` returns the top element of the poset or
`None`. I guess this could be argued to both sides.
6) Thanks!
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Ticket URL: <http://trac.sagemath.org/ticket/19801#comment:6>
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