#4252 closed defect (duplicate)
Arrangements / PermutationsNK iterator is broken
| Reported by: | saliola | Owned by: | mhansen |
|---|---|---|---|
| Priority: | major | Milestone: | sage-duplicate/invalid/wontfix |
| Component: | combinatorics | Keywords: | |
| Cc: | sage-combinat | Merged in: | |
| Authors: | Reviewers: | ||
| Report Upstream: | Work issues: | ||
| Branch: | Commit: | ||
| Dependencies: | Stopgaps: |
Status badges
Description
sage: Arrangements(range(5),4).count() 116 sage: len(list(sage.combinat.permutation.PermutationsNK(5,4).iterator())) 116 sage: factorial(5)/factorial(5-4) 120
They should all be 120. This also doesn't work for the pairs: (4,4), (5, 4), (5, 5), (6, 4), (6, 5), (6, 6), ....
Change History (2)
comment:1 Changed 13 years ago by
- Milestone changed from sage-3.2 to sage-duplicate/invalid
- Resolution set to duplicate
- Status changed from new to closed
comment:2 Changed 12 years ago by
- Cc sage-combinat added
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This is a duplicate of #4213 which has been fixed in 3.1.3.