Identifier
-
Mp00129:
Dyck paths
—to 321-avoiding permutation (Billey-Jockusch-Stanley)⟶
Permutations
St001461: Permutations ⟶ ℤ
Values
[1,0] => [1] => 1
[1,0,1,0] => [2,1] => 1
[1,1,0,0] => [1,2] => 2
[1,0,1,0,1,0] => [2,3,1] => 1
[1,0,1,1,0,0] => [2,1,3] => 2
[1,1,0,0,1,0] => [1,3,2] => 2
[1,1,0,1,0,0] => [3,1,2] => 1
[1,1,1,0,0,0] => [1,2,3] => 3
[1,0,1,0,1,0,1,0] => [2,3,4,1] => 1
[1,0,1,0,1,1,0,0] => [2,3,1,4] => 2
[1,0,1,1,0,0,1,0] => [2,1,4,3] => 2
[1,0,1,1,0,1,0,0] => [2,4,1,3] => 1
[1,0,1,1,1,0,0,0] => [2,1,3,4] => 3
[1,1,0,0,1,0,1,0] => [1,3,4,2] => 2
[1,1,0,0,1,1,0,0] => [1,3,2,4] => 3
[1,1,0,1,0,0,1,0] => [3,1,4,2] => 1
[1,1,0,1,0,1,0,0] => [3,4,1,2] => 1
[1,1,0,1,1,0,0,0] => [3,1,2,4] => 2
[1,1,1,0,0,0,1,0] => [1,2,4,3] => 3
[1,1,1,0,0,1,0,0] => [1,4,2,3] => 2
[1,1,1,0,1,0,0,0] => [4,1,2,3] => 1
[1,1,1,1,0,0,0,0] => [1,2,3,4] => 4
[1,0,1,0,1,0,1,0,1,0] => [2,3,4,5,1] => 1
[1,0,1,0,1,0,1,1,0,0] => [2,3,4,1,5] => 2
[1,0,1,0,1,1,0,0,1,0] => [2,3,1,5,4] => 2
[1,0,1,0,1,1,0,1,0,0] => [2,3,5,1,4] => 1
[1,0,1,0,1,1,1,0,0,0] => [2,3,1,4,5] => 3
[1,0,1,1,0,0,1,0,1,0] => [2,1,4,5,3] => 2
[1,0,1,1,0,0,1,1,0,0] => [2,1,4,3,5] => 3
[1,0,1,1,0,1,0,0,1,0] => [2,4,1,5,3] => 1
[1,0,1,1,0,1,0,1,0,0] => [2,4,5,1,3] => 1
[1,0,1,1,0,1,1,0,0,0] => [2,4,1,3,5] => 2
[1,0,1,1,1,0,0,0,1,0] => [2,1,3,5,4] => 3
[1,0,1,1,1,0,0,1,0,0] => [2,1,5,3,4] => 2
[1,0,1,1,1,0,1,0,0,0] => [2,5,1,3,4] => 1
[1,0,1,1,1,1,0,0,0,0] => [2,1,3,4,5] => 4
[1,1,0,0,1,0,1,0,1,0] => [1,3,4,5,2] => 2
[1,1,0,0,1,0,1,1,0,0] => [1,3,4,2,5] => 3
[1,1,0,0,1,1,0,0,1,0] => [1,3,2,5,4] => 3
[1,1,0,0,1,1,0,1,0,0] => [1,3,5,2,4] => 2
[1,1,0,0,1,1,1,0,0,0] => [1,3,2,4,5] => 4
[1,1,0,1,0,0,1,0,1,0] => [3,1,4,5,2] => 1
[1,1,0,1,0,0,1,1,0,0] => [3,1,4,2,5] => 2
[1,1,0,1,0,1,0,0,1,0] => [3,4,1,5,2] => 1
[1,1,0,1,0,1,0,1,0,0] => [3,4,5,1,2] => 1
[1,1,0,1,0,1,1,0,0,0] => [3,4,1,2,5] => 2
[1,1,0,1,1,0,0,0,1,0] => [3,1,2,5,4] => 2
[1,1,0,1,1,0,0,1,0,0] => [3,1,5,2,4] => 1
[1,1,0,1,1,0,1,0,0,0] => [3,5,1,2,4] => 1
[1,1,0,1,1,1,0,0,0,0] => [3,1,2,4,5] => 3
[1,1,1,0,0,0,1,0,1,0] => [1,2,4,5,3] => 3
[1,1,1,0,0,0,1,1,0,0] => [1,2,4,3,5] => 4
[1,1,1,0,0,1,0,0,1,0] => [1,4,2,5,3] => 2
[1,1,1,0,0,1,0,1,0,0] => [1,4,5,2,3] => 2
[1,1,1,0,0,1,1,0,0,0] => [1,4,2,3,5] => 3
[1,1,1,0,1,0,0,0,1,0] => [4,1,2,5,3] => 1
[1,1,1,0,1,0,0,1,0,0] => [4,1,5,2,3] => 1
[1,1,1,0,1,0,1,0,0,0] => [4,5,1,2,3] => 1
[1,1,1,0,1,1,0,0,0,0] => [4,1,2,3,5] => 2
[1,1,1,1,0,0,0,0,1,0] => [1,2,3,5,4] => 4
[1,1,1,1,0,0,0,1,0,0] => [1,2,5,3,4] => 3
[1,1,1,1,0,0,1,0,0,0] => [1,5,2,3,4] => 2
[1,1,1,1,0,1,0,0,0,0] => [5,1,2,3,4] => 1
[1,1,1,1,1,0,0,0,0,0] => [1,2,3,4,5] => 5
[1,0,1,0,1,0,1,0,1,0,1,0] => [2,3,4,5,6,1] => 1
[1,0,1,0,1,0,1,0,1,1,0,0] => [2,3,4,5,1,6] => 2
[1,0,1,0,1,0,1,1,0,0,1,0] => [2,3,4,1,6,5] => 2
[1,0,1,0,1,0,1,1,0,1,0,0] => [2,3,4,6,1,5] => 1
[1,0,1,0,1,0,1,1,1,0,0,0] => [2,3,4,1,5,6] => 3
[1,0,1,0,1,1,0,0,1,0,1,0] => [2,3,1,5,6,4] => 2
[1,0,1,0,1,1,0,0,1,1,0,0] => [2,3,1,5,4,6] => 3
[1,0,1,0,1,1,0,1,0,0,1,0] => [2,3,5,1,6,4] => 1
[1,0,1,0,1,1,0,1,0,1,0,0] => [2,3,5,6,1,4] => 1
[1,0,1,0,1,1,0,1,1,0,0,0] => [2,3,5,1,4,6] => 2
[1,0,1,0,1,1,1,0,0,0,1,0] => [2,3,1,4,6,5] => 3
[1,0,1,0,1,1,1,0,0,1,0,0] => [2,3,1,6,4,5] => 2
[1,0,1,0,1,1,1,0,1,0,0,0] => [2,3,6,1,4,5] => 1
[1,0,1,0,1,1,1,1,0,0,0,0] => [2,3,1,4,5,6] => 4
[1,0,1,1,0,0,1,0,1,0,1,0] => [2,1,4,5,6,3] => 2
[1,0,1,1,0,0,1,0,1,1,0,0] => [2,1,4,5,3,6] => 3
[1,0,1,1,0,0,1,1,0,0,1,0] => [2,1,4,3,6,5] => 3
[1,0,1,1,0,0,1,1,0,1,0,0] => [2,1,4,6,3,5] => 2
[1,0,1,1,0,0,1,1,1,0,0,0] => [2,1,4,3,5,6] => 4
[1,0,1,1,0,1,0,0,1,0,1,0] => [2,4,1,5,6,3] => 1
[1,0,1,1,0,1,0,0,1,1,0,0] => [2,4,1,5,3,6] => 2
[1,0,1,1,0,1,0,1,0,0,1,0] => [2,4,5,1,6,3] => 1
[1,0,1,1,0,1,0,1,0,1,0,0] => [2,4,5,6,1,3] => 1
[1,0,1,1,0,1,0,1,1,0,0,0] => [2,4,5,1,3,6] => 2
[1,0,1,1,0,1,1,0,0,0,1,0] => [2,4,1,3,6,5] => 2
[1,0,1,1,0,1,1,0,0,1,0,0] => [2,4,1,6,3,5] => 1
[1,0,1,1,0,1,1,0,1,0,0,0] => [2,4,6,1,3,5] => 1
[1,0,1,1,0,1,1,1,0,0,0,0] => [2,4,1,3,5,6] => 3
[1,0,1,1,1,0,0,0,1,0,1,0] => [2,1,3,5,6,4] => 3
[1,0,1,1,1,0,0,0,1,1,0,0] => [2,1,3,5,4,6] => 4
[1,0,1,1,1,0,0,1,0,0,1,0] => [2,1,5,3,6,4] => 2
[1,0,1,1,1,0,0,1,0,1,0,0] => [2,1,5,6,3,4] => 2
[1,0,1,1,1,0,0,1,1,0,0,0] => [2,1,5,3,4,6] => 3
[1,0,1,1,1,0,1,0,0,0,1,0] => [2,5,1,3,6,4] => 1
[1,0,1,1,1,0,1,0,0,1,0,0] => [2,5,1,6,3,4] => 1
[1,0,1,1,1,0,1,0,1,0,0,0] => [2,5,6,1,3,4] => 1
[1,0,1,1,1,0,1,1,0,0,0,0] => [2,5,1,3,4,6] => 2
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Description
The number of topologically connected components of the chord diagram of a permutation.
The chord diagram of a permutation $\pi\in\mathfrak S_n$ is obtained by placing labels $1,\dots,n$ in cyclic order on a cycle and drawing a (straight) arc from $i$ to $\pi(i)$ for every label $i$.
This statistic records the number of topologically connected components in the chord diagram. In particular, if two arcs cross, all four labels connected by the two arcs are in the same component.
The permutation $\pi\in\mathfrak S_n$ stabilizes an interval $I=\{a,a+1,\dots,b\}$ if $\pi(I)=I$. It is stabilized-interval-free, if the only interval $\pi$ stablizes is $\{1,\dots,n\}$. Thus, this statistic is $1$ if $\pi$ is stabilized-interval-free.
The chord diagram of a permutation $\pi\in\mathfrak S_n$ is obtained by placing labels $1,\dots,n$ in cyclic order on a cycle and drawing a (straight) arc from $i$ to $\pi(i)$ for every label $i$.
This statistic records the number of topologically connected components in the chord diagram. In particular, if two arcs cross, all four labels connected by the two arcs are in the same component.
The permutation $\pi\in\mathfrak S_n$ stabilizes an interval $I=\{a,a+1,\dots,b\}$ if $\pi(I)=I$. It is stabilized-interval-free, if the only interval $\pi$ stablizes is $\{1,\dots,n\}$. Thus, this statistic is $1$ if $\pi$ is stabilized-interval-free.
Map
to 321-avoiding permutation (Billey-Jockusch-Stanley)
Description
The Billey-Jockusch-Stanley bijection to 321-avoiding permutations.
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