Opened 5 years ago
Closed 5 years ago
#12831 closed enhancement (fixed)
implement product of posets
Reported by: | chapoton | Owned by: | sage-combinat |
---|---|---|---|
Priority: | major | Milestone: | sage-5.1 |
Component: | combinatorics | Keywords: | poset, product |
Cc: | chapoton, sage-combinat | Merged in: | sage-5.1.beta1 |
Authors: | Frédéric Chapoton | Reviewers: | Itai Bar-Natan |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | #12770 | Stopgaps: |
Description
There currently lacks an implementation of the (cartesian) product of posets.
sage: P2=Posets.ChainPoset(2) sage: P4=Posets.ChainPoset(4) sage: Q=P2.product(P4)
This should return a poset with 8 elements, with Hasse diagram a 2 x 4 grid.
It would be nice to have a fast enough procedure for this.
Attachments (1)
Change History (11)
comment:1 Changed 5 years ago by
- Dependencies set to #12770
comment:2 Changed 5 years ago by
- Status changed from new to needs_review
comment:3 Changed 5 years ago by
- Status changed from needs_review to needs_work
comment:4 Changed 5 years ago by
- Status changed from needs_work to needs_review
comment:5 Changed 5 years ago by
- Cc chapoton sage-combinat added
- Milestone changed from sage-5.1 to sage-5.0
Changed 5 years ago by
comment:6 Changed 5 years ago by
comment:7 Changed 5 years ago by
- Milestone changed from sage-5.0 to sage-5.1
comment:8 Changed 5 years ago by
- Status changed from needs_review to positive_review
comment:9 Changed 5 years ago by
- Reviewers set to Itai Bar-Natan
comment:10 Changed 5 years ago by
- Merged in set to sage-5.1.beta1
- Resolution set to fixed
- Status changed from positive_review to closed
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Some typos need to be corrected..