IncreasingCyclePermutation from SetPartition
The permutation whose cycles are the blocks, each cycle increasing: every element goes to the next larger in its block, the largest to the least.
FindStat's Mp00080, Sage's to_permutation. Injective; it maximizes the exceedances among the permutations with these cycles.
Called as CombinatorialMap(x, "IncreasingCyclePermutation"). The head's page has its examples.
Live
Explore
Each element of SetPartition at a size, and its image, applied in your browser; sizes past 7 are not offered.
Properties
Transport a statistic
Pick a statistic on Permutation. Its distribution over the images of SetPartition at each size is computed, and compared with the 111 statistics on SetPartition: those that share it are the ones the map sends it to, as far as the sizes computed show.
FindStat Mp00080
to permutation
Matched by value: our map agrees with FindStat's image on each of the 278 rows of size at most 6 we can read (0 unread; its table has 1200 rows).
InjectionGraded mapas FindStat records them, checked by FindStat's contributors.
| Object | Image |
|---|---|
{{1}} | [1] |
{{1,2}} | [2,1] |
{{1,2,3}} | [2,3,1] |
{{1},{2}} | [1,2] |
Data from FindStat, the combinatorial statistic finder; the page at findstat.org/Mp00080 has the rest.