Identifier
-
Mp00080:
Set partitions
—to permutation⟶
Permutations
Mp00236: Permutations —Clarke-Steingrimsson-Zeng inverse⟶ Permutations
Mp00237: Permutations —descent views to invisible inversion bottoms⟶ Permutations
St000031: Permutations ⟶ ℤ
Values
{{1}} => [1] => [1] => [1] => 1
{{1,2}} => [2,1] => [2,1] => [2,1] => 1
{{1},{2}} => [1,2] => [1,2] => [1,2] => 2
{{1,2,3}} => [2,3,1] => [3,2,1] => [2,3,1] => 1
{{1,2},{3}} => [2,1,3] => [2,1,3] => [2,1,3] => 2
{{1,3},{2}} => [3,2,1] => [2,3,1] => [3,2,1] => 2
{{1},{2,3}} => [1,3,2] => [1,3,2] => [1,3,2] => 2
{{1},{2},{3}} => [1,2,3] => [1,2,3] => [1,2,3] => 3
{{1,2,3,4}} => [2,3,4,1] => [4,3,2,1] => [2,3,4,1] => 1
{{1,2,3},{4}} => [2,3,1,4] => [3,2,1,4] => [2,3,1,4] => 2
{{1,2,4},{3}} => [2,4,3,1] => [3,4,2,1] => [2,4,3,1] => 2
{{1,2},{3,4}} => [2,1,4,3] => [2,1,4,3] => [2,1,4,3] => 2
{{1,2},{3},{4}} => [2,1,3,4] => [2,1,3,4] => [2,1,3,4] => 3
{{1,3,4},{2}} => [3,2,4,1] => [2,4,3,1] => [3,2,4,1] => 2
{{1,3},{2,4}} => [3,4,1,2] => [4,1,3,2] => [4,3,1,2] => 1
{{1,3},{2},{4}} => [3,2,1,4] => [2,3,1,4] => [3,2,1,4] => 3
{{1,4},{2,3}} => [4,3,2,1] => [3,2,4,1] => [4,3,2,1] => 2
{{1},{2,3,4}} => [1,3,4,2] => [1,4,3,2] => [1,3,4,2] => 2
{{1},{2,3},{4}} => [1,3,2,4] => [1,3,2,4] => [1,3,2,4] => 3
{{1,4},{2},{3}} => [4,2,3,1] => [2,3,4,1] => [4,2,3,1] => 3
{{1},{2,4},{3}} => [1,4,3,2] => [1,3,4,2] => [1,4,3,2] => 3
{{1},{2},{3,4}} => [1,2,4,3] => [1,2,4,3] => [1,2,4,3] => 3
{{1},{2},{3},{4}} => [1,2,3,4] => [1,2,3,4] => [1,2,3,4] => 4
{{1,2,3,4,5}} => [2,3,4,5,1] => [5,4,3,2,1] => [2,3,4,5,1] => 1
{{1,2,3,4},{5}} => [2,3,4,1,5] => [4,3,2,1,5] => [2,3,4,1,5] => 2
{{1,2,3,5},{4}} => [2,3,5,4,1] => [4,5,3,2,1] => [2,3,5,4,1] => 2
{{1,2,3},{4,5}} => [2,3,1,5,4] => [3,2,1,5,4] => [2,3,1,5,4] => 2
{{1,2,3},{4},{5}} => [2,3,1,4,5] => [3,2,1,4,5] => [2,3,1,4,5] => 3
{{1,2,4,5},{3}} => [2,4,3,5,1] => [3,5,4,2,1] => [2,4,3,5,1] => 2
{{1,2,4},{3,5}} => [2,4,5,1,3] => [5,2,1,4,3] => [2,5,4,1,3] => 1
{{1,2,4},{3},{5}} => [2,4,3,1,5] => [3,4,2,1,5] => [2,4,3,1,5] => 3
{{1,2,5},{3,4}} => [2,5,4,3,1] => [4,3,5,2,1] => [2,5,4,3,1] => 2
{{1,2},{3,4,5}} => [2,1,4,5,3] => [2,1,5,4,3] => [2,1,4,5,3] => 2
{{1,2},{3,4},{5}} => [2,1,4,3,5] => [2,1,4,3,5] => [2,1,4,3,5] => 3
{{1,2,5},{3},{4}} => [2,5,3,4,1] => [3,4,5,2,1] => [2,5,3,4,1] => 3
{{1,2},{3,5},{4}} => [2,1,5,4,3] => [2,1,4,5,3] => [2,1,5,4,3] => 3
{{1,2},{3},{4,5}} => [2,1,3,5,4] => [2,1,3,5,4] => [2,1,3,5,4] => 3
{{1,2},{3},{4},{5}} => [2,1,3,4,5] => [2,1,3,4,5] => [2,1,3,4,5] => 4
{{1,3,4,5},{2}} => [3,2,4,5,1] => [2,5,4,3,1] => [3,2,4,5,1] => 2
{{1,3,4},{2,5}} => [3,5,4,1,2] => [4,1,5,3,2] => [4,3,5,1,2] => 2
{{1,3,4},{2},{5}} => [3,2,4,1,5] => [2,4,3,1,5] => [3,2,4,1,5] => 3
{{1,3,5},{2,4}} => [3,4,5,2,1] => [5,2,4,3,1] => [3,4,5,1,2] => 1
{{1,3},{2,4,5}} => [3,4,1,5,2] => [5,4,1,3,2] => [4,3,1,5,2] => 1
{{1,3},{2,4},{5}} => [3,4,1,2,5] => [4,1,3,2,5] => [4,3,1,2,5] => 2
{{1,3,5},{2},{4}} => [3,2,5,4,1] => [2,4,5,3,1] => [3,2,5,4,1] => 3
{{1,3},{2,5},{4}} => [3,5,1,4,2] => [4,5,1,3,2] => [5,3,1,4,2] => 2
{{1,3},{2},{4,5}} => [3,2,1,5,4] => [2,3,1,5,4] => [3,2,1,5,4] => 3
{{1,3},{2},{4},{5}} => [3,2,1,4,5] => [2,3,1,4,5] => [3,2,1,4,5] => 4
{{1,4,5},{2,3}} => [4,3,2,5,1] => [3,2,5,4,1] => [4,3,2,5,1] => 2
{{1,4},{2,3,5}} => [4,3,5,1,2] => [5,3,1,4,2] => [3,5,4,2,1] => 1
{{1,4},{2,3},{5}} => [4,3,2,1,5] => [3,2,4,1,5] => [4,3,2,1,5] => 3
{{1,5},{2,3,4}} => [5,3,4,2,1] => [4,3,2,5,1] => [5,3,4,2,1] => 2
{{1},{2,3,4,5}} => [1,3,4,5,2] => [1,5,4,3,2] => [1,3,4,5,2] => 2
{{1},{2,3,4},{5}} => [1,3,4,2,5] => [1,4,3,2,5] => [1,3,4,2,5] => 3
{{1,5},{2,3},{4}} => [5,3,2,4,1] => [3,2,4,5,1] => [5,3,2,4,1] => 3
{{1},{2,3,5},{4}} => [1,3,5,4,2] => [1,4,5,3,2] => [1,3,5,4,2] => 3
{{1},{2,3},{4,5}} => [1,3,2,5,4] => [1,3,2,5,4] => [1,3,2,5,4] => 3
{{1},{2,3},{4},{5}} => [1,3,2,4,5] => [1,3,2,4,5] => [1,3,2,4,5] => 4
{{1,4,5},{2},{3}} => [4,2,3,5,1] => [2,3,5,4,1] => [4,2,3,5,1] => 3
{{1,4},{2,5},{3}} => [4,5,3,1,2] => [3,5,1,4,2] => [5,4,3,1,2] => 2
{{1,4},{2},{3,5}} => [4,2,5,1,3] => [2,5,1,4,3] => [5,2,4,1,3] => 2
{{1,4},{2},{3},{5}} => [4,2,3,1,5] => [2,3,4,1,5] => [4,2,3,1,5] => 4
{{1,5},{2,4},{3}} => [5,4,3,2,1] => [3,4,2,5,1] => [5,4,3,2,1] => 3
{{1},{2,4,5},{3}} => [1,4,3,5,2] => [1,3,5,4,2] => [1,4,3,5,2] => 3
{{1},{2,4},{3,5}} => [1,4,5,2,3] => [1,5,2,4,3] => [1,5,4,2,3] => 2
{{1},{2,4},{3},{5}} => [1,4,3,2,5] => [1,3,4,2,5] => [1,4,3,2,5] => 4
{{1,5},{2},{3,4}} => [5,2,4,3,1] => [2,4,3,5,1] => [5,2,4,3,1] => 3
{{1},{2,5},{3,4}} => [1,5,4,3,2] => [1,4,3,5,2] => [1,5,4,3,2] => 3
{{1},{2},{3,4,5}} => [1,2,4,5,3] => [1,2,5,4,3] => [1,2,4,5,3] => 3
{{1},{2},{3,4},{5}} => [1,2,4,3,5] => [1,2,4,3,5] => [1,2,4,3,5] => 4
{{1,5},{2},{3},{4}} => [5,2,3,4,1] => [2,3,4,5,1] => [5,2,3,4,1] => 4
{{1},{2,5},{3},{4}} => [1,5,3,4,2] => [1,3,4,5,2] => [1,5,3,4,2] => 4
{{1},{2},{3,5},{4}} => [1,2,5,4,3] => [1,2,4,5,3] => [1,2,5,4,3] => 4
{{1},{2},{3},{4,5}} => [1,2,3,5,4] => [1,2,3,5,4] => [1,2,3,5,4] => 4
{{1},{2},{3},{4},{5}} => [1,2,3,4,5] => [1,2,3,4,5] => [1,2,3,4,5] => 5
{{1,2,3,4,5,6}} => [2,3,4,5,6,1] => [6,5,4,3,2,1] => [2,3,4,5,6,1] => 1
{{1,2,3,4,5},{6}} => [2,3,4,5,1,6] => [5,4,3,2,1,6] => [2,3,4,5,1,6] => 2
{{1,2,3,4,6},{5}} => [2,3,4,6,5,1] => [5,6,4,3,2,1] => [2,3,4,6,5,1] => 2
{{1,2,3,4},{5,6}} => [2,3,4,1,6,5] => [4,3,2,1,6,5] => [2,3,4,1,6,5] => 2
{{1,2,3,4},{5},{6}} => [2,3,4,1,5,6] => [4,3,2,1,5,6] => [2,3,4,1,5,6] => 3
{{1,2,3,5,6},{4}} => [2,3,5,4,6,1] => [4,6,5,3,2,1] => [2,3,5,4,6,1] => 2
{{1,2,3,5},{4,6}} => [2,3,5,6,1,4] => [6,3,2,1,5,4] => [2,3,6,5,1,4] => 1
{{1,2,3,5},{4},{6}} => [2,3,5,4,1,6] => [4,5,3,2,1,6] => [2,3,5,4,1,6] => 3
{{1,2,3,6},{4,5}} => [2,3,6,5,4,1] => [5,4,6,3,2,1] => [2,3,6,5,4,1] => 2
{{1,2,3},{4,5,6}} => [2,3,1,5,6,4] => [3,2,1,6,5,4] => [2,3,1,5,6,4] => 2
{{1,2,3},{4,5},{6}} => [2,3,1,5,4,6] => [3,2,1,5,4,6] => [2,3,1,5,4,6] => 3
{{1,2,3,6},{4},{5}} => [2,3,6,4,5,1] => [4,5,6,3,2,1] => [2,3,6,4,5,1] => 3
{{1,2,3},{4,6},{5}} => [2,3,1,6,5,4] => [3,2,1,5,6,4] => [2,3,1,6,5,4] => 3
{{1,2,3},{4},{5,6}} => [2,3,1,4,6,5] => [3,2,1,4,6,5] => [2,3,1,4,6,5] => 3
{{1,2,3},{4},{5},{6}} => [2,3,1,4,5,6] => [3,2,1,4,5,6] => [2,3,1,4,5,6] => 4
{{1,2,4,5,6},{3}} => [2,4,3,5,6,1] => [3,6,5,4,2,1] => [2,4,3,5,6,1] => 2
{{1,2,4,5},{3,6}} => [2,4,6,5,1,3] => [5,2,1,6,4,3] => [2,5,4,6,1,3] => 2
{{1,2,4,5},{3},{6}} => [2,4,3,5,1,6] => [3,5,4,2,1,6] => [2,4,3,5,1,6] => 3
{{1,2,4,6},{3,5}} => [2,4,5,6,3,1] => [6,3,5,4,2,1] => [2,4,5,6,1,3] => 1
{{1,2,4},{3,5,6}} => [2,4,5,1,6,3] => [6,5,2,1,4,3] => [2,5,4,1,6,3] => 1
{{1,2,4},{3,5},{6}} => [2,4,5,1,3,6] => [5,2,1,4,3,6] => [2,5,4,1,3,6] => 2
{{1,2,4,6},{3},{5}} => [2,4,3,6,5,1] => [3,5,6,4,2,1] => [2,4,3,6,5,1] => 3
{{1,2,4},{3,6},{5}} => [2,4,6,1,5,3] => [5,6,2,1,4,3] => [2,6,4,1,5,3] => 2
{{1,2,4},{3},{5,6}} => [2,4,3,1,6,5] => [3,4,2,1,6,5] => [2,4,3,1,6,5] => 3
{{1,2,4},{3},{5},{6}} => [2,4,3,1,5,6] => [3,4,2,1,5,6] => [2,4,3,1,5,6] => 4
{{1,2,5,6},{3,4}} => [2,5,4,3,6,1] => [4,3,6,5,2,1] => [2,5,4,3,6,1] => 2
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Description
The number of cycles in the cycle decomposition of a permutation.
Map
to permutation
Description
Sends the set partition to the permutation obtained by considering the blocks as increasing cycles.
Map
Clarke-Steingrimsson-Zeng inverse
Description
The inverse of the Clarke-Steingrimsson-Zeng map, sending excedances to descents.
This is the inverse of the map $\Phi$ in [1, sec.3].
This is the inverse of the map $\Phi$ in [1, sec.3].
Map
descent views to invisible inversion bottoms
Description
Return a permutation whose multiset of invisible inversion bottoms is the multiset of descent views of the given permutation.
This map is similar to Mp00235descent views to invisible inversion bottoms, but different beginning with permutations of six elements.
An invisible inversion of a permutation $\sigma$ is a pair $i < j$ such that $i < \sigma(j) < \sigma(i)$. The element $\sigma(j)$ is then an invisible inversion bottom.
A descent view in a permutation $\pi$ is an element $\pi(j)$ such that $\pi(i+1) < \pi(j) < \pi(i)$, and additionally the smallest element in the decreasing run containing $\pi(i)$ is smaller than the smallest element in the decreasing run containing $\pi(j)$.
This map is a bijection $\chi:\mathfrak S_n \to \mathfrak S_n$, such that
This map is similar to Mp00235descent views to invisible inversion bottoms, but different beginning with permutations of six elements.
An invisible inversion of a permutation $\sigma$ is a pair $i < j$ such that $i < \sigma(j) < \sigma(i)$. The element $\sigma(j)$ is then an invisible inversion bottom.
A descent view in a permutation $\pi$ is an element $\pi(j)$ such that $\pi(i+1) < \pi(j) < \pi(i)$, and additionally the smallest element in the decreasing run containing $\pi(i)$ is smaller than the smallest element in the decreasing run containing $\pi(j)$.
This map is a bijection $\chi:\mathfrak S_n \to \mathfrak S_n$, such that
- the multiset of descent views in $\pi$ is the multiset of invisible inversion bottoms in $\chi(\pi)$,
- the set of left-to-right maximima of $\pi$ is the set of maximal elements in the cycles of $\chi(\pi)$,
- the set of global ascent of $\pi$ is the set of global ascent of $\chi(\pi)$,
- the set of maximal elements in the decreasing runs of $\pi$ is the set of deficiency positions of $\chi(\pi)$, and
- the set of minimal elements in the decreasing runs of $\pi$ is the set of deficiency values of $\chi(\pi)$.
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