Identifier
-
Mp00233:
Dyck paths
—skew partition⟶
Skew partitions
Mp00183: Skew partitions —inner shape⟶ Integer partitions
Mp00043: Integer partitions —to Dyck path⟶ Dyck paths
St001232: Dyck paths ⟶ ℤ
Values
[1,1,0,0,1,0] => [[2,2],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,0,0,1,0] => [[2,2,1],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,0,1,0,1,0] => [[2,2,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,0,1,1,0,0] => [[3,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,1,0,0,1,0] => [[3,3],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,0,1,1,0,0,0] => [[3,3],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,0,0,1,0] => [[2,2,2],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,0,1,1,0,0,1,0] => [[2,2,1,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,0,0,1,0,1,0] => [[2,2,2,1],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,0,1,1,0,0,1,1,0,0] => [[3,2,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,0,1,0,0,1,0] => [[3,3,1],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,0,1,1,0,1,1,0,0,0] => [[3,3,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,1,0,0,0,1,0] => [[2,2,2,1],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,0,1,0,1,0,1,0] => [[2,2,2,2],[1,1,1]] => [1,1,1] => [1,0,1,1,1,0,0,0] => 3
[1,1,0,0,1,0,1,1,0,0] => [[3,2,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,0,1,1,0,1,0,0] => [[4,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,0,1,1,1,0,0,0] => [[3,3,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,1,0,0,1,0,1,0] => [[3,3,3],[2,2]] => [2,2] => [1,1,0,0,1,1,0,0] => 2
[1,1,0,1,0,0,1,1,0,0] => [[4,3],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,0,1,0,1,0,0,1,0] => [[4,4],[3]] => [3] => [1,1,1,0,0,0,1,0] => 1
[1,1,0,1,0,1,1,0,0,0] => [[4,4],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,0,1,1,0,0,1,0,0] => [[4,3],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,1,1,0,1,0,0,0] => [[3,3,3],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,1,1,1,0,0,0,0] => [[4,4],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,0,0,1,0,1,0] => [[2,2,2,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,1,0,0,0,1,1,0,0] => [[3,2,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,0,1,0,0,1,0] => [[3,3,2],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,1,0,0,1,1,0,0,0] => [[3,3,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,1,0,0,0,1,0] => [[2,2,2,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,1,0,0,0,0,1,0] => [[3,3,3],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,1,1,0,0,1,0,0,0] => [[3,3,3],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,0,1,0,1,1,0,0,1,0] => [[2,2,1,1,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,0,1,1,0,0,1,0,1,0] => [[2,2,2,1,1],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,0,1,0,1,1,0,0,1,1,0,0] => [[3,2,1,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,0,1,1,0,1,0,0,1,0] => [[3,3,1,1],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,0,1,0,1,1,0,1,1,0,0,0] => [[3,3,1,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,0,1,1,1,0,0,0,1,0] => [[2,2,2,1,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,0,0,1,0,1,0,1,0] => [[2,2,2,2,1],[1,1,1]] => [1,1,1] => [1,0,1,1,1,0,0,0] => 3
[1,0,1,1,0,0,1,0,1,1,0,0] => [[3,2,2,1],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,0,1,1,0,0,1,1,0,1,0,0] => [[4,2,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,0,0,1,1,1,0,0,0] => [[3,3,2,1],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,0,1,1,0,1,0,0,1,0,1,0] => [[3,3,3,1],[2,2]] => [2,2] => [1,1,0,0,1,1,0,0] => 2
[1,0,1,1,0,1,0,0,1,1,0,0] => [[4,3,1],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,0,1,1,0,1,0,1,0,0,1,0] => [[4,4,1],[3]] => [3] => [1,1,1,0,0,0,1,0] => 1
[1,0,1,1,0,1,0,1,1,0,0,0] => [[4,4,1],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,0,1,1,0,1,1,0,0,1,0,0] => [[4,3,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,0,1,1,0,1,0,0,0] => [[3,3,3,1],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,0,1,1,0,1,1,1,0,0,0,0] => [[4,4,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,1,0,0,0,1,0,1,0] => [[2,2,2,2,1],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,0,1,1,1,0,0,0,1,1,0,0] => [[3,2,2,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,1,0,0,1,0,0,1,0] => [[3,3,2,1],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,0,1,1,1,0,0,1,1,0,0,0] => [[3,3,2,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,1,0,1,0,0,0,1,0] => [[2,2,2,2,1],[1]] => [1] => [1,0,1,0] => 1
[1,0,1,1,1,1,0,0,0,0,1,0] => [[3,3,3,1],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,0,1,1,1,1,0,0,1,0,0,0] => [[3,3,3,1],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,0,1,0,1,0,1,0,1,0] => [[2,2,2,2,2],[1,1,1,1]] => [1,1,1,1] => [1,0,1,1,1,1,0,0,0,0] => 4
[1,1,0,0,1,0,1,0,1,1,0,0] => [[3,2,2,2],[1,1,1]] => [1,1,1] => [1,0,1,1,1,0,0,0] => 3
[1,1,0,0,1,0,1,1,0,1,0,0] => [[4,2,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,0,1,0,1,1,1,0,0,0] => [[3,3,2,2],[1,1,1]] => [1,1,1] => [1,0,1,1,1,0,0,0] => 3
[1,1,0,0,1,1,0,1,0,1,0,0] => [[5,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,0,1,1,1,0,0,1,0,0] => [[4,3,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,0,1,1,1,0,1,0,0,0] => [[3,3,3,2],[1,1,1]] => [1,1,1] => [1,0,1,1,1,0,0,0] => 3
[1,1,0,0,1,1,1,1,0,0,0,0] => [[4,4,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,1,0,0,1,0,1,0,1,0] => [[3,3,3,3],[2,2,2]] => [2,2,2] => [1,1,0,0,1,1,1,0,0,0] => 3
[1,1,0,1,0,0,1,0,1,1,0,0] => [[4,3,3],[2,2]] => [2,2] => [1,1,0,0,1,1,0,0] => 2
[1,1,0,1,0,0,1,1,0,1,0,0] => [[5,3],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,0,1,0,0,1,1,1,0,0,0] => [[4,4,3],[2,2]] => [2,2] => [1,1,0,0,1,1,0,0] => 2
[1,1,0,1,0,1,0,0,1,0,1,0] => [[4,4,4],[3,3]] => [3,3] => [1,1,1,0,0,0,1,1,0,0] => 2
[1,1,0,1,0,1,0,0,1,1,0,0] => [[5,4],[3]] => [3] => [1,1,1,0,0,0,1,0] => 1
[1,1,0,1,0,1,0,1,0,0,1,0] => [[5,5],[4]] => [4] => [1,1,1,1,0,0,0,0,1,0] => 1
[1,1,0,1,0,1,0,1,1,0,0,0] => [[5,5],[3]] => [3] => [1,1,1,0,0,0,1,0] => 1
[1,1,0,1,0,1,1,0,0,1,0,0] => [[5,4],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,0,1,0,1,1,0,1,0,0,0] => [[4,4,4],[2,2]] => [2,2] => [1,1,0,0,1,1,0,0] => 2
[1,1,0,1,0,1,1,1,0,0,0,0] => [[5,5],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,0,1,1,0,0,1,0,1,0,0] => [[5,3],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,1,1,0,1,0,0,1,0,0] => [[4,3,3],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,1,1,0,1,0,1,0,0,0] => [[3,3,3,3],[1,1,1]] => [1,1,1] => [1,0,1,1,1,0,0,0] => 3
[1,1,0,1,1,0,1,1,0,0,0,0] => [[4,4,3],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,0,1,1,1,0,0,0,1,0,0] => [[5,4],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,1,1,1,0,1,0,0,0,0] => [[5,5],[1]] => [1] => [1,0,1,0] => 1
[1,1,0,1,1,1,1,0,0,0,0,0] => [[4,4,4],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,1,0,0,0,1,0,1,0,1,0] => [[2,2,2,2,2],[1,1,1]] => [1,1,1] => [1,0,1,1,1,0,0,0] => 3
[1,1,1,0,0,0,1,0,1,1,0,0] => [[3,2,2,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,1,0,0,0,1,1,0,1,0,0] => [[4,2,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,0,0,1,1,1,0,0,0] => [[3,3,2,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,1,0,0,1,0,0,1,0,1,0] => [[3,3,3,2],[2,2]] => [2,2] => [1,1,0,0,1,1,0,0] => 2
[1,1,1,0,0,1,0,0,1,1,0,0] => [[4,3,2],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,1,0,0,1,0,1,0,0,1,0] => [[4,4,2],[3]] => [3] => [1,1,1,0,0,0,1,0] => 1
[1,1,1,0,0,1,0,1,1,0,0,0] => [[4,4,2],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,1,0,0,1,1,0,0,1,0,0] => [[4,3,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,0,1,1,0,1,0,0,0] => [[3,3,3,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,1,0,0,1,1,1,0,0,0,0] => [[4,4,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,1,0,0,0,1,0,1,0] => [[2,2,2,2,2],[1,1]] => [1,1] => [1,0,1,1,0,0] => 2
[1,1,1,0,1,0,0,0,1,1,0,0] => [[3,2,2,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,1,0,0,1,0,0,1,0] => [[3,3,2,2],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,1,0,1,0,0,1,1,0,0,0] => [[3,3,2,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,1,0,1,0,0,0,1,0] => [[2,2,2,2,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,0,1,1,0,0,0,0,1,0] => [[3,3,3,2],[2]] => [2] => [1,1,0,0,1,0] => 1
[1,1,1,0,1,1,0,0,1,0,0,0] => [[3,3,3,2],[1]] => [1] => [1,0,1,0] => 1
[1,1,1,1,0,0,0,0,1,0,1,0] => [[3,3,3,3],[2,2]] => [2,2] => [1,1,0,0,1,1,0,0] => 2
[1,1,1,1,0,0,0,0,1,1,0,0] => [[4,3,3],[2]] => [2] => [1,1,0,0,1,0] => 1
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Description
The number of indecomposable modules with projective dimension 2 for Nakayama algebras with global dimension at most 2.
Map
skew partition
Description
The parallelogram polyomino corresponding to a Dyck path, interpreted as a skew partition.
Let D be a Dyck path of semilength n. The parallelogram polyomino γ(D) is defined as follows: let ˜D=d0d1…d2n+1 be the Dyck path obtained by prepending an up step and appending a down step to D. Then, the upper path of γ(D) corresponds to the sequence of steps of ˜D with even indices, and the lower path of γ(D) corresponds to the sequence of steps of ˜D with odd indices.
This map returns the skew partition definded by the diagram of γ(D).
Let D be a Dyck path of semilength n. The parallelogram polyomino γ(D) is defined as follows: let ˜D=d0d1…d2n+1 be the Dyck path obtained by prepending an up step and appending a down step to D. Then, the upper path of γ(D) corresponds to the sequence of steps of ˜D with even indices, and the lower path of γ(D) corresponds to the sequence of steps of ˜D with odd indices.
This map returns the skew partition definded by the diagram of γ(D).
Map
inner shape
Description
The inner shape of a skew partition.
Map
to Dyck path
Description
Sends a partition to the shortest Dyck path tracing the shape of its Ferrers diagram.
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