Identifier
-
Mp00080:
Set partitions
—to permutation⟶
Permutations
Mp00090: Permutations —cycle-as-one-line notation⟶ Permutations
Mp00160: Permutations —graph of inversions⟶ Graphs
St000455: Graphs ⟶ ℤ
Values
{{1,3},{2}} => [3,2,1] => [1,3,2] => ([(1,2)],3) => 0
{{1,2,4},{3}} => [2,4,3,1] => [1,2,4,3] => ([(2,3)],4) => 0
{{1,3,4},{2}} => [3,2,4,1] => [1,3,4,2] => ([(1,3),(2,3)],4) => 0
{{1,3},{2,4}} => [3,4,1,2] => [1,3,2,4] => ([(2,3)],4) => 0
{{1,3},{2},{4}} => [3,2,1,4] => [1,3,2,4] => ([(2,3)],4) => 0
{{1,4},{2,3}} => [4,3,2,1] => [1,4,2,3] => ([(1,3),(2,3)],4) => 0
{{1,4},{2},{3}} => [4,2,3,1] => [1,4,2,3] => ([(1,3),(2,3)],4) => 0
{{1},{2,4},{3}} => [1,4,3,2] => [1,2,4,3] => ([(2,3)],4) => 0
{{1,2,3,5},{4}} => [2,3,5,4,1] => [1,2,3,5,4] => ([(3,4)],5) => 0
{{1,2,4,5},{3}} => [2,4,3,5,1] => [1,2,4,5,3] => ([(2,4),(3,4)],5) => 0
{{1,2,4},{3,5}} => [2,4,5,1,3] => [1,2,4,3,5] => ([(3,4)],5) => 0
{{1,2,4},{3},{5}} => [2,4,3,1,5] => [1,2,4,3,5] => ([(3,4)],5) => 0
{{1,2,5},{3,4}} => [2,5,4,3,1] => [1,2,5,3,4] => ([(2,4),(3,4)],5) => 0
{{1,2,5},{3},{4}} => [2,5,3,4,1] => [1,2,5,3,4] => ([(2,4),(3,4)],5) => 0
{{1,2},{3,5},{4}} => [2,1,5,4,3] => [1,2,3,5,4] => ([(3,4)],5) => 0
{{1,3,4,5},{2}} => [3,2,4,5,1] => [1,3,4,5,2] => ([(1,4),(2,4),(3,4)],5) => 0
{{1,3,4},{2,5}} => [3,5,4,1,2] => [1,3,4,2,5] => ([(2,4),(3,4)],5) => 0
{{1,3,4},{2},{5}} => [3,2,4,1,5] => [1,3,4,2,5] => ([(2,4),(3,4)],5) => 0
{{1,3},{2,4,5}} => [3,4,1,5,2] => [1,3,2,4,5] => ([(3,4)],5) => 0
{{1,3},{2,4},{5}} => [3,4,1,2,5] => [1,3,2,4,5] => ([(3,4)],5) => 0
{{1,3},{2,5},{4}} => [3,5,1,4,2] => [1,3,2,5,4] => ([(1,4),(2,3)],5) => 0
{{1,3},{2},{4,5}} => [3,2,1,5,4] => [1,3,2,4,5] => ([(3,4)],5) => 0
{{1,3},{2},{4},{5}} => [3,2,1,4,5] => [1,3,2,4,5] => ([(3,4)],5) => 0
{{1,4,5},{2,3}} => [4,3,2,5,1] => [1,4,5,2,3] => ([(1,3),(1,4),(2,3),(2,4)],5) => 0
{{1,4},{2,3,5}} => [4,3,5,1,2] => [1,4,2,3,5] => ([(2,4),(3,4)],5) => 0
{{1,4},{2,3},{5}} => [4,3,2,1,5] => [1,4,2,3,5] => ([(2,4),(3,4)],5) => 0
{{1,5},{2,3,4}} => [5,3,4,2,1] => [1,5,2,3,4] => ([(1,4),(2,4),(3,4)],5) => 0
{{1,5},{2,3},{4}} => [5,3,2,4,1] => [1,5,2,3,4] => ([(1,4),(2,4),(3,4)],5) => 0
{{1},{2,3,5},{4}} => [1,3,5,4,2] => [1,2,3,5,4] => ([(3,4)],5) => 0
{{1,4,5},{2},{3}} => [4,2,3,5,1] => [1,4,5,2,3] => ([(1,3),(1,4),(2,3),(2,4)],5) => 0
{{1,4},{2},{3,5}} => [4,2,5,1,3] => [1,4,2,3,5] => ([(2,4),(3,4)],5) => 0
{{1,4},{2},{3},{5}} => [4,2,3,1,5] => [1,4,2,3,5] => ([(2,4),(3,4)],5) => 0
{{1},{2,4,5},{3}} => [1,4,3,5,2] => [1,2,4,5,3] => ([(2,4),(3,4)],5) => 0
{{1},{2,4},{3,5}} => [1,4,5,2,3] => [1,2,4,3,5] => ([(3,4)],5) => 0
{{1},{2,4},{3},{5}} => [1,4,3,2,5] => [1,2,4,3,5] => ([(3,4)],5) => 0
{{1,5},{2},{3,4}} => [5,2,4,3,1] => [1,5,2,3,4] => ([(1,4),(2,4),(3,4)],5) => 0
{{1},{2,5},{3,4}} => [1,5,4,3,2] => [1,2,5,3,4] => ([(2,4),(3,4)],5) => 0
{{1,5},{2},{3},{4}} => [5,2,3,4,1] => [1,5,2,3,4] => ([(1,4),(2,4),(3,4)],5) => 0
{{1},{2,5},{3},{4}} => [1,5,3,4,2] => [1,2,5,3,4] => ([(2,4),(3,4)],5) => 0
{{1},{2},{3,5},{4}} => [1,2,5,4,3] => [1,2,3,5,4] => ([(3,4)],5) => 0
{{1,2,3,4,6},{5}} => [2,3,4,6,5,1] => [1,2,3,4,6,5] => ([(4,5)],6) => 0
{{1,2,3,5,6},{4}} => [2,3,5,4,6,1] => [1,2,3,5,6,4] => ([(3,5),(4,5)],6) => 0
{{1,2,3,5},{4,6}} => [2,3,5,6,1,4] => [1,2,3,5,4,6] => ([(4,5)],6) => 0
{{1,2,3,5},{4},{6}} => [2,3,5,4,1,6] => [1,2,3,5,4,6] => ([(4,5)],6) => 0
{{1,2,3,6},{4,5}} => [2,3,6,5,4,1] => [1,2,3,6,4,5] => ([(3,5),(4,5)],6) => 0
{{1,2,3,6},{4},{5}} => [2,3,6,4,5,1] => [1,2,3,6,4,5] => ([(3,5),(4,5)],6) => 0
{{1,2,3},{4,6},{5}} => [2,3,1,6,5,4] => [1,2,3,4,6,5] => ([(4,5)],6) => 0
{{1,2,4,5,6},{3}} => [2,4,3,5,6,1] => [1,2,4,5,6,3] => ([(2,5),(3,5),(4,5)],6) => 0
{{1,2,4,5},{3,6}} => [2,4,6,5,1,3] => [1,2,4,5,3,6] => ([(3,5),(4,5)],6) => 0
{{1,2,4,5},{3},{6}} => [2,4,3,5,1,6] => [1,2,4,5,3,6] => ([(3,5),(4,5)],6) => 0
{{1,2,4},{3,5,6}} => [2,4,5,1,6,3] => [1,2,4,3,5,6] => ([(4,5)],6) => 0
{{1,2,4},{3,5},{6}} => [2,4,5,1,3,6] => [1,2,4,3,5,6] => ([(4,5)],6) => 0
{{1,2,4},{3,6},{5}} => [2,4,6,1,5,3] => [1,2,4,3,6,5] => ([(2,5),(3,4)],6) => 0
{{1,2,4},{3},{5,6}} => [2,4,3,1,6,5] => [1,2,4,3,5,6] => ([(4,5)],6) => 0
{{1,2,4},{3},{5},{6}} => [2,4,3,1,5,6] => [1,2,4,3,5,6] => ([(4,5)],6) => 0
{{1,2,5,6},{3,4}} => [2,5,4,3,6,1] => [1,2,5,6,3,4] => ([(2,4),(2,5),(3,4),(3,5)],6) => 0
{{1,2,5},{3,4,6}} => [2,5,4,6,1,3] => [1,2,5,3,4,6] => ([(3,5),(4,5)],6) => 0
{{1,2,5},{3,4},{6}} => [2,5,4,3,1,6] => [1,2,5,3,4,6] => ([(3,5),(4,5)],6) => 0
{{1,2,6},{3,4,5}} => [2,6,4,5,3,1] => [1,2,6,3,4,5] => ([(2,5),(3,5),(4,5)],6) => 0
{{1,2,6},{3,4},{5}} => [2,6,4,3,5,1] => [1,2,6,3,4,5] => ([(2,5),(3,5),(4,5)],6) => 0
{{1,2},{3,4,6},{5}} => [2,1,4,6,5,3] => [1,2,3,4,6,5] => ([(4,5)],6) => 0
{{1,2,5,6},{3},{4}} => [2,5,3,4,6,1] => [1,2,5,6,3,4] => ([(2,4),(2,5),(3,4),(3,5)],6) => 0
{{1,2,5},{3},{4,6}} => [2,5,3,6,1,4] => [1,2,5,3,4,6] => ([(3,5),(4,5)],6) => 0
{{1,2,5},{3},{4},{6}} => [2,5,3,4,1,6] => [1,2,5,3,4,6] => ([(3,5),(4,5)],6) => 0
{{1,2},{3,5,6},{4}} => [2,1,5,4,6,3] => [1,2,3,5,6,4] => ([(3,5),(4,5)],6) => 0
{{1,2},{3,5},{4,6}} => [2,1,5,6,3,4] => [1,2,3,5,4,6] => ([(4,5)],6) => 0
{{1,2},{3,5},{4},{6}} => [2,1,5,4,3,6] => [1,2,3,5,4,6] => ([(4,5)],6) => 0
{{1,2,6},{3},{4,5}} => [2,6,3,5,4,1] => [1,2,6,3,4,5] => ([(2,5),(3,5),(4,5)],6) => 0
{{1,2},{3,6},{4,5}} => [2,1,6,5,4,3] => [1,2,3,6,4,5] => ([(3,5),(4,5)],6) => 0
{{1,2,6},{3},{4},{5}} => [2,6,3,4,5,1] => [1,2,6,3,4,5] => ([(2,5),(3,5),(4,5)],6) => 0
{{1,2},{3,6},{4},{5}} => [2,1,6,4,5,3] => [1,2,3,6,4,5] => ([(3,5),(4,5)],6) => 0
{{1,2},{3},{4,6},{5}} => [2,1,3,6,5,4] => [1,2,3,4,6,5] => ([(4,5)],6) => 0
{{1,3,4,5,6},{2}} => [3,2,4,5,6,1] => [1,3,4,5,6,2] => ([(1,5),(2,5),(3,5),(4,5)],6) => 0
{{1,3,4,5},{2,6}} => [3,6,4,5,1,2] => [1,3,4,5,2,6] => ([(2,5),(3,5),(4,5)],6) => 0
{{1,3,4,5},{2},{6}} => [3,2,4,5,1,6] => [1,3,4,5,2,6] => ([(2,5),(3,5),(4,5)],6) => 0
{{1,3,4},{2,5,6}} => [3,5,4,1,6,2] => [1,3,4,2,5,6] => ([(3,5),(4,5)],6) => 0
{{1,3,4},{2,5},{6}} => [3,5,4,1,2,6] => [1,3,4,2,5,6] => ([(3,5),(4,5)],6) => 0
{{1,3,4},{2,6},{5}} => [3,6,4,1,5,2] => [1,3,4,2,6,5] => ([(1,2),(3,5),(4,5)],6) => 1
{{1,3,4},{2},{5,6}} => [3,2,4,1,6,5] => [1,3,4,2,5,6] => ([(3,5),(4,5)],6) => 0
{{1,3,4},{2},{5},{6}} => [3,2,4,1,5,6] => [1,3,4,2,5,6] => ([(3,5),(4,5)],6) => 0
{{1,3},{2,4,5,6}} => [3,4,1,5,6,2] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,3},{2,4,5},{6}} => [3,4,1,5,2,6] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,3},{2,4,6},{5}} => [3,4,1,6,5,2] => [1,3,2,4,6,5] => ([(2,5),(3,4)],6) => 0
{{1,3},{2,4},{5,6}} => [3,4,1,2,6,5] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,3},{2,4},{5},{6}} => [3,4,1,2,5,6] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,3,5},{2,6},{4}} => [3,6,5,4,1,2] => [1,3,5,2,6,4] => ([(1,5),(2,4),(3,4),(3,5)],6) => 1
{{1,3,6},{2,5},{4}} => [3,5,6,4,2,1] => [1,3,6,2,5,4] => ([(1,4),(2,3),(2,5),(3,5),(4,5)],6) => 1
{{1,3},{2,5,6},{4}} => [3,5,1,4,6,2] => [1,3,2,5,6,4] => ([(1,2),(3,5),(4,5)],6) => 1
{{1,3},{2,5},{4,6}} => [3,5,1,6,2,4] => [1,3,2,5,4,6] => ([(2,5),(3,4)],6) => 0
{{1,3},{2,5},{4},{6}} => [3,5,1,4,2,6] => [1,3,2,5,4,6] => ([(2,5),(3,4)],6) => 0
{{1,3},{2,6},{4,5}} => [3,6,1,5,4,2] => [1,3,2,6,4,5] => ([(1,2),(3,5),(4,5)],6) => 1
{{1,3},{2},{4,5,6}} => [3,2,1,5,6,4] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,3},{2},{4,5},{6}} => [3,2,1,5,4,6] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,3},{2,6},{4},{5}} => [3,6,1,4,5,2] => [1,3,2,6,4,5] => ([(1,2),(3,5),(4,5)],6) => 1
{{1,3},{2},{4,6},{5}} => [3,2,1,6,5,4] => [1,3,2,4,6,5] => ([(2,5),(3,4)],6) => 0
{{1,3},{2},{4},{5,6}} => [3,2,1,4,6,5] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,3},{2},{4},{5},{6}} => [3,2,1,4,5,6] => [1,3,2,4,5,6] => ([(4,5)],6) => 0
{{1,4,5,6},{2,3}} => [4,3,2,5,6,1] => [1,4,5,6,2,3] => ([(1,4),(1,5),(2,4),(2,5),(3,4),(3,5)],6) => 0
{{1,4,5},{2,3,6}} => [4,3,6,5,1,2] => [1,4,5,2,3,6] => ([(2,4),(2,5),(3,4),(3,5)],6) => 0
{{1,4,5},{2,3},{6}} => [4,3,2,5,1,6] => [1,4,5,2,3,6] => ([(2,4),(2,5),(3,4),(3,5)],6) => 0
{{1,4},{2,3,5,6}} => [4,3,5,1,6,2] => [1,4,2,3,5,6] => ([(3,5),(4,5)],6) => 0
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Description
The second largest eigenvalue of a graph if it is integral.
This statistic is undefined if the second largest eigenvalue of the graph is not integral.
Chapter 4 of [1] provides lots of context.
This statistic is undefined if the second largest eigenvalue of the graph is not integral.
Chapter 4 of [1] provides lots of context.
Map
graph of inversions
Description
The graph of inversions of a permutation.
For a permutation of $\{1,\dots,n\}$, this is the graph with vertices $\{1,\dots,n\}$, where $(i,j)$ is an edge if and only if it is an inversion of the permutation.
For a permutation of $\{1,\dots,n\}$, this is the graph with vertices $\{1,\dots,n\}$, where $(i,j)$ is an edge if and only if it is an inversion of the permutation.
Map
cycle-as-one-line notation
Description
Return the permutation obtained by concatenating the cycles of a permutation, each written with minimal element first, sorted by minimal element.
Map
to permutation
Description
Sends the set partition to the permutation obtained by considering the blocks as increasing cycles.
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