Identifier
Values
[1,0] => [[1],[]] => ([],1) => 0
[1,0,1,0] => [[1,1],[]] => ([(0,1)],2) => 0
[1,1,0,0] => [[2],[]] => ([(0,1)],2) => 0
[1,0,1,0,1,0] => [[1,1,1],[]] => ([(0,2),(2,1)],3) => 0
[1,0,1,1,0,0] => [[2,1],[]] => ([(0,1),(0,2)],3) => 0
[1,1,0,0,1,0] => [[2,2],[1]] => ([(0,2),(1,2)],3) => 0
[1,1,0,1,0,0] => [[3],[]] => ([(0,2),(2,1)],3) => 0
[1,1,1,0,0,0] => [[2,2],[]] => ([(0,1),(0,2),(1,3),(2,3)],4) => 1
[1,0,1,0,1,0,1,0] => [[1,1,1,1],[]] => ([(0,3),(2,1),(3,2)],4) => 0
[1,0,1,0,1,1,0,0] => [[2,1,1],[]] => ([(0,2),(0,3),(3,1)],4) => 0
[1,0,1,1,0,0,1,0] => [[2,2,1],[1]] => ([(0,3),(1,2),(1,3)],4) => 0
[1,0,1,1,0,1,0,0] => [[3,1],[]] => ([(0,2),(0,3),(3,1)],4) => 0
[1,0,1,1,1,0,0,0] => [[2,2,1],[]] => ([(0,2),(0,3),(2,4),(3,1),(3,4)],5) => 1
[1,1,0,0,1,0,1,0] => [[2,2,2],[1,1]] => ([(0,3),(1,2),(2,3)],4) => 0
[1,1,0,0,1,1,0,0] => [[3,2],[1]] => ([(0,3),(1,2),(1,3)],4) => 0
[1,1,0,1,0,0,1,0] => [[3,3],[2]] => ([(0,3),(1,2),(2,3)],4) => 0
[1,1,0,1,0,1,0,0] => [[4],[]] => ([(0,3),(2,1),(3,2)],4) => 0
[1,1,0,1,1,0,0,0] => [[3,3],[1]] => ([(0,3),(1,2),(1,3),(2,4),(3,4)],5) => 1
[1,1,1,0,0,0,1,0] => [[2,2,2],[1]] => ([(0,3),(1,2),(1,3),(2,4),(3,4)],5) => 1
[1,1,1,0,0,1,0,0] => [[3,2],[]] => ([(0,2),(0,3),(2,4),(3,1),(3,4)],5) => 1
[1,1,1,0,1,0,0,0] => [[2,2,2],[]] => ([(0,2),(0,3),(1,5),(2,4),(3,1),(3,4),(4,5)],6) => 2
[1,1,1,1,0,0,0,0] => [[3,3],[]] => ([(0,2),(0,3),(1,5),(2,4),(3,1),(3,4),(4,5)],6) => 2
[1,0,1,0,1,0,1,0,1,0] => [[1,1,1,1,1],[]] => ([(0,4),(2,3),(3,1),(4,2)],5) => 0
[1,0,1,0,1,0,1,1,0,0] => [[2,1,1,1],[]] => ([(0,2),(0,4),(3,1),(4,3)],5) => 0
[1,0,1,0,1,1,0,0,1,0] => [[2,2,1,1],[1]] => ([(0,4),(1,2),(1,4),(2,3)],5) => 0
[1,0,1,0,1,1,0,1,0,0] => [[3,1,1],[]] => ([(0,3),(0,4),(3,2),(4,1)],5) => 0
[1,0,1,0,1,1,1,0,0,0] => [[2,2,1,1],[]] => ([(0,2),(0,4),(2,5),(3,1),(4,3),(4,5)],6) => 1
[1,0,1,1,0,0,1,0,1,0] => [[2,2,2,1],[1,1]] => ([(0,3),(1,2),(1,4),(3,4)],5) => 0
[1,0,1,1,0,0,1,1,0,0] => [[3,2,1],[1]] => ([(0,3),(0,4),(1,2),(1,4)],5) => 0
[1,0,1,1,0,1,0,0,1,0] => [[3,3,1],[2]] => ([(0,4),(1,2),(1,3),(3,4)],5) => 0
[1,0,1,1,0,1,0,1,0,0] => [[4,1],[]] => ([(0,2),(0,4),(3,1),(4,3)],5) => 0
[1,0,1,1,0,1,1,0,0,0] => [[3,3,1],[1]] => ([(0,2),(0,4),(1,3),(1,4),(3,5),(4,5)],6) => 1
[1,0,1,1,1,0,0,0,1,0] => [[2,2,2,1],[1]] => ([(0,4),(1,2),(1,4),(2,3),(2,5),(4,5)],6) => 1
[1,0,1,1,1,0,0,1,0,0] => [[3,2,1],[]] => ([(0,3),(0,4),(3,2),(3,5),(4,1),(4,5)],6) => 1
[1,1,0,0,1,0,1,0,1,0] => [[2,2,2,2],[1,1,1]] => ([(0,4),(1,2),(2,3),(3,4)],5) => 0
[1,1,0,0,1,0,1,1,0,0] => [[3,2,2],[1,1]] => ([(0,4),(1,2),(1,3),(3,4)],5) => 0
[1,1,0,0,1,1,0,0,1,0] => [[3,3,2],[2,1]] => ([(0,4),(1,3),(2,3),(2,4)],5) => 0
[1,1,0,0,1,1,0,1,0,0] => [[4,2],[1]] => ([(0,4),(1,2),(1,4),(2,3)],5) => 0
[1,1,0,0,1,1,1,0,0,0] => [[3,3,2],[1,1]] => ([(0,4),(1,2),(1,3),(2,5),(3,4),(3,5)],6) => 1
[1,1,0,1,0,0,1,0,1,0] => [[3,3,3],[2,2]] => ([(0,3),(1,2),(2,4),(3,4)],5) => 0
[1,1,0,1,0,0,1,1,0,0] => [[4,3],[2]] => ([(0,3),(1,2),(1,4),(3,4)],5) => 0
[1,1,0,1,0,1,0,0,1,0] => [[4,4],[3]] => ([(0,4),(1,2),(2,3),(3,4)],5) => 0
[1,1,0,1,0,1,0,1,0,0] => [[5],[]] => ([(0,4),(2,3),(3,1),(4,2)],5) => 0
[1,1,0,1,0,1,1,0,0,0] => [[4,4],[2]] => ([(0,3),(1,2),(1,4),(2,5),(3,4),(4,5)],6) => 1
[1,1,0,1,1,0,0,0,1,0] => [[3,3,3],[2,1]] => ([(0,4),(1,3),(2,3),(2,4),(3,5),(4,5)],6) => 1
[1,1,0,1,1,0,0,1,0,0] => [[4,3],[1]] => ([(0,4),(1,2),(1,4),(2,3),(2,5),(4,5)],6) => 1
[1,1,1,0,0,0,1,0,1,0] => [[2,2,2,2],[1,1]] => ([(0,3),(1,2),(1,4),(2,5),(3,4),(4,5)],6) => 1
[1,1,1,0,0,0,1,1,0,0] => [[3,2,2],[1]] => ([(0,2),(0,4),(1,3),(1,4),(3,5),(4,5)],6) => 1
[1,1,1,0,0,1,0,0,1,0] => [[3,3,2],[2]] => ([(0,4),(1,2),(1,3),(2,5),(3,4),(3,5)],6) => 1
[1,1,1,0,0,1,0,1,0,0] => [[4,2],[]] => ([(0,2),(0,4),(2,5),(3,1),(4,3),(4,5)],6) => 1
[1,0,1,0,1,0,1,0,1,0,1,0] => [[1,1,1,1,1,1],[]] => ([(0,5),(2,4),(3,2),(4,1),(5,3)],6) => 0
[1,0,1,0,1,0,1,0,1,1,0,0] => [[2,1,1,1,1],[]] => ([(0,2),(0,5),(3,4),(4,1),(5,3)],6) => 0
[1,0,1,0,1,0,1,1,0,0,1,0] => [[2,2,1,1,1],[1]] => ([(0,5),(1,4),(1,5),(3,2),(4,3)],6) => 0
[1,0,1,0,1,0,1,1,0,1,0,0] => [[3,1,1,1],[]] => ([(0,4),(0,5),(3,2),(4,3),(5,1)],6) => 0
[1,0,1,0,1,1,0,0,1,0,1,0] => [[2,2,2,1,1],[1,1]] => ([(0,3),(1,4),(1,5),(3,5),(4,2)],6) => 0
[1,0,1,0,1,1,0,0,1,1,0,0] => [[3,2,1,1],[1]] => ([(0,3),(0,5),(1,4),(1,5),(4,2)],6) => 0
[1,0,1,0,1,1,0,1,0,0,1,0] => [[3,3,1,1],[2]] => ([(0,5),(1,3),(1,4),(3,5),(4,2)],6) => 0
[1,0,1,0,1,1,0,1,0,1,0,0] => [[4,1,1],[]] => ([(0,4),(0,5),(3,2),(4,3),(5,1)],6) => 0
[1,0,1,1,0,0,1,0,1,0,1,0] => [[2,2,2,2,1],[1,1,1]] => ([(0,4),(1,3),(1,5),(2,5),(4,2)],6) => 0
[1,0,1,1,0,0,1,0,1,1,0,0] => [[3,2,2,1],[1,1]] => ([(0,4),(0,5),(1,2),(1,3),(3,5)],6) => 0
[1,0,1,1,0,0,1,1,0,0,1,0] => [[3,3,2,1],[2,1]] => ([(0,4),(1,4),(1,5),(2,3),(2,5)],6) => 0
[1,0,1,1,0,0,1,1,0,1,0,0] => [[4,2,1],[1]] => ([(0,3),(0,5),(1,4),(1,5),(4,2)],6) => 0
[1,0,1,1,0,1,0,0,1,0,1,0] => [[3,3,3,1],[2,2]] => ([(0,4),(1,2),(1,3),(3,5),(4,5)],6) => 0
[1,0,1,1,0,1,0,0,1,1,0,0] => [[4,3,1],[2]] => ([(0,4),(0,5),(1,2),(1,3),(3,5)],6) => 0
[1,0,1,1,0,1,0,1,0,0,1,0] => [[4,4,1],[3]] => ([(0,5),(1,2),(1,4),(3,5),(4,3)],6) => 0
[1,0,1,1,0,1,0,1,0,1,0,0] => [[5,1],[]] => ([(0,2),(0,5),(3,4),(4,1),(5,3)],6) => 0
[1,1,0,0,1,0,1,0,1,0,1,0] => [[2,2,2,2,2],[1,1,1,1]] => ([(0,5),(1,4),(2,5),(3,2),(4,3)],6) => 0
[1,1,0,0,1,0,1,0,1,1,0,0] => [[3,2,2,2],[1,1,1]] => ([(0,5),(1,2),(1,4),(3,5),(4,3)],6) => 0
[1,1,0,0,1,0,1,1,0,0,1,0] => [[3,3,2,2],[2,1,1]] => ([(0,5),(1,4),(2,3),(2,4),(3,5)],6) => 0
[1,1,0,0,1,0,1,1,0,1,0,0] => [[4,2,2],[1,1]] => ([(0,5),(1,3),(1,4),(3,5),(4,2)],6) => 0
[1,1,0,0,1,1,0,0,1,0,1,0] => [[3,3,3,2],[2,2,1]] => ([(0,4),(1,4),(1,5),(2,3),(3,5)],6) => 0
[1,1,0,0,1,1,0,0,1,1,0,0] => [[4,3,2],[2,1]] => ([(0,4),(1,4),(1,5),(2,3),(2,5)],6) => 0
[1,1,0,0,1,1,0,1,0,0,1,0] => [[4,4,2],[3,1]] => ([(0,5),(1,4),(2,3),(2,4),(3,5)],6) => 0
[1,1,0,0,1,1,0,1,0,1,0,0] => [[5,2],[1]] => ([(0,5),(1,4),(1,5),(3,2),(4,3)],6) => 0
[1,1,0,1,0,0,1,0,1,0,1,0] => [[3,3,3,3],[2,2,2]] => ([(0,3),(1,4),(2,5),(3,5),(4,2)],6) => 0
[1,1,0,1,0,0,1,0,1,1,0,0] => [[4,3,3],[2,2]] => ([(0,4),(1,2),(1,3),(3,5),(4,5)],6) => 0
[1,1,0,1,0,0,1,1,0,0,1,0] => [[4,4,3],[3,2]] => ([(0,4),(1,4),(1,5),(2,3),(3,5)],6) => 0
[1,1,0,1,0,0,1,1,0,1,0,0] => [[5,3],[2]] => ([(0,3),(1,4),(1,5),(3,5),(4,2)],6) => 0
[1,1,0,1,0,1,0,0,1,0,1,0] => [[4,4,4],[3,3]] => ([(0,3),(1,4),(2,5),(3,5),(4,2)],6) => 0
[1,1,0,1,0,1,0,0,1,1,0,0] => [[5,4],[3]] => ([(0,4),(1,3),(1,5),(2,5),(4,2)],6) => 0
[1,1,0,1,0,1,0,1,0,0,1,0] => [[5,5],[4]] => ([(0,5),(1,4),(2,5),(3,2),(4,3)],6) => 0
[1,1,0,1,0,1,0,1,0,1,0,0] => [[6],[]] => ([(0,5),(2,4),(3,2),(4,1),(5,3)],6) => 0
[1,0,1,0,1,0,1,0,1,0,1,0,1,0] => [[1,1,1,1,1,1,1],[]] => ([(0,6),(2,3),(3,5),(4,2),(5,1),(6,4)],7) => 0
[1,1,0,1,0,1,0,1,0,1,0,1,0,0] => [[7],[]] => ([(0,6),(2,3),(3,5),(4,2),(5,1),(6,4)],7) => 0
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Description
The number of simple modules with projective dimension two in the incidence algebra of the poset.
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 $\gamma(D)$ is defined as follows: let $\tilde D = d_0 d_1 \dots d_{2n+1}$ be the Dyck path obtained by prepending an up step and appending a down step to $D$. Then, the upper path of $\gamma(D)$ corresponds to the sequence of steps of $\tilde D$ with even indices, and the lower path of $\gamma(D)$ corresponds to the sequence of steps of $\tilde D$ with odd indices.
This map returns the skew partition definded by the diagram of $\gamma(D)$.
Map
cell poset
Description
The Young diagram of a skew partition regarded as a poset.
This is the poset on the cells of the Young diagram, such that a cell $d$ is greater than a cell $c$ if the entry in $d$ must be larger than the entry of $c$ in any standard Young tableau on the skew partition.