#13250: Additional poset examples
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Reporter: csar | Owner: sage-combinat
Type: | Status: needs_work
enhancement | Milestone: sage-6.9
Priority: major | Resolution:
Component: | Merged in:
combinatorics | Reviewers:
Keywords: sd40, | Work issues:
posets | Commit:
Authors: | 3001cb17abf6271bce9cdc19400f95bfb5b830cf
Report Upstream: N/A | Stopgaps:
Branch: |
u/chapoton/13250 |
Dependencies: |
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Comment (by jmantysalo):
Replying to [comment:35 kdilks]:
> Implementing fences ( https://en.wikipedia.org/wiki/Fence_(mathematics)
), which is a generalization of the zig-zag poset, would also be good.
Wikipedia says that up-down -posets are a generalization of fences. Should
we implement it directly, as a fence would be then available as
`updown_poset(1, n)`?
Young's lattice is a semilattice. Should the function then return a
semilattice instead of "only" poset? Or should we have an option for
return type? I.e. `type='poset'` or something like it?
These are of course only suggestions.
--
Ticket URL: <http://trac.sagemath.org/ticket/13250#comment:36>
Sage <http://www.sagemath.org>
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