Identifier
-
Mp00324:
Graphs
—chromatic difference sequence⟶
Integer compositions
Mp00039: Integer compositions —complement⟶ Integer compositions
Mp00231: Integer compositions —bounce path⟶ Dyck paths
St001265: Dyck paths ⟶ ℤ
Values
([],1) => [1] => [1] => [1,0] => 0
([],2) => [2] => [1,1] => [1,0,1,0] => 0
([(0,1)],2) => [1,1] => [2] => [1,1,0,0] => 1
([],3) => [3] => [1,1,1] => [1,0,1,0,1,0] => 0
([(1,2)],3) => [2,1] => [1,2] => [1,0,1,1,0,0] => 1
([(0,2),(1,2)],3) => [2,1] => [1,2] => [1,0,1,1,0,0] => 1
([(0,1),(0,2),(1,2)],3) => [1,1,1] => [3] => [1,1,1,0,0,0] => 2
([],4) => [4] => [1,1,1,1] => [1,0,1,0,1,0,1,0] => 0
([(2,3)],4) => [3,1] => [1,1,2] => [1,0,1,0,1,1,0,0] => 1
([(1,3),(2,3)],4) => [3,1] => [1,1,2] => [1,0,1,0,1,1,0,0] => 1
([(0,3),(1,3),(2,3)],4) => [3,1] => [1,1,2] => [1,0,1,0,1,1,0,0] => 1
([(0,3),(1,2)],4) => [2,2] => [1,2,1] => [1,0,1,1,0,0,1,0] => 2
([(0,3),(1,2),(2,3)],4) => [2,2] => [1,2,1] => [1,0,1,1,0,0,1,0] => 2
([(1,2),(1,3),(2,3)],4) => [2,1,1] => [1,3] => [1,0,1,1,1,0,0,0] => 2
([(0,3),(1,2),(1,3),(2,3)],4) => [2,1,1] => [1,3] => [1,0,1,1,1,0,0,0] => 2
([(0,2),(0,3),(1,2),(1,3)],4) => [2,2] => [1,2,1] => [1,0,1,1,0,0,1,0] => 2
([(0,2),(0,3),(1,2),(1,3),(2,3)],4) => [2,1,1] => [1,3] => [1,0,1,1,1,0,0,0] => 2
([(0,1),(0,2),(0,3),(1,2),(1,3),(2,3)],4) => [1,1,1,1] => [4] => [1,1,1,1,0,0,0,0] => 3
([],5) => [5] => [1,1,1,1,1] => [1,0,1,0,1,0,1,0,1,0] => 0
([(3,4)],5) => [4,1] => [1,1,1,2] => [1,0,1,0,1,0,1,1,0,0] => 1
([(2,4),(3,4)],5) => [4,1] => [1,1,1,2] => [1,0,1,0,1,0,1,1,0,0] => 1
([(1,4),(2,4),(3,4)],5) => [4,1] => [1,1,1,2] => [1,0,1,0,1,0,1,1,0,0] => 1
([(0,4),(1,4),(2,4),(3,4)],5) => [4,1] => [1,1,1,2] => [1,0,1,0,1,0,1,1,0,0] => 1
([(1,4),(2,3)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(1,4),(2,3),(3,4)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(0,1),(2,4),(3,4)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(2,3),(2,4),(3,4)],5) => [3,1,1] => [1,1,3] => [1,0,1,0,1,1,1,0,0,0] => 2
([(0,4),(1,4),(2,3),(3,4)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(1,4),(2,3),(2,4),(3,4)],5) => [3,1,1] => [1,1,3] => [1,0,1,0,1,1,1,0,0,0] => 2
([(0,4),(1,4),(2,3),(2,4),(3,4)],5) => [3,1,1] => [1,1,3] => [1,0,1,0,1,1,1,0,0,0] => 2
([(1,3),(1,4),(2,3),(2,4)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(0,4),(1,2),(1,3),(2,4),(3,4)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [3,1,1] => [1,1,3] => [1,0,1,0,1,1,1,0,0,0] => 2
([(0,4),(1,3),(2,3),(2,4),(3,4)],5) => [3,1,1] => [1,1,3] => [1,0,1,0,1,1,1,0,0,0] => 2
([(0,4),(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [3,1,1] => [1,1,3] => [1,0,1,0,1,1,1,0,0,0] => 2
([(0,3),(0,4),(1,3),(1,4),(2,3),(2,4)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(0,3),(0,4),(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [3,1,1] => [1,1,3] => [1,0,1,0,1,1,1,0,0,0] => 2
([(0,4),(1,3),(2,3),(2,4)],5) => [3,2] => [1,1,2,1] => [1,0,1,0,1,1,0,0,1,0] => 2
([(0,1),(2,3),(2,4),(3,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,3),(1,2),(1,4),(2,4),(3,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,3),(0,4),(1,2),(1,4),(2,4),(3,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,3),(0,4),(1,2),(1,4),(2,3)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,1),(0,4),(1,3),(2,3),(2,4),(3,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,3),(0,4),(1,2),(1,4),(2,3),(2,4),(3,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,4),(1,2),(1,3),(2,3),(2,4),(3,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(1,2),(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [2,1,1,1] => [1,4] => [1,0,1,1,1,1,0,0,0,0] => 3
([(0,4),(1,2),(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [2,1,1,1] => [1,4] => [1,0,1,1,1,1,0,0,0,0] => 3
([(0,3),(0,4),(1,2),(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [2,1,1,1] => [1,4] => [1,0,1,1,1,1,0,0,0,0] => 3
([(0,3),(0,4),(1,2),(1,3),(1,4),(2,3),(2,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,2),(0,3),(0,4),(1,2),(1,3),(1,4),(2,4),(3,4)],5) => [2,2,1] => [1,2,2] => [1,0,1,1,0,0,1,1,0,0] => 3
([(0,2),(0,3),(0,4),(1,2),(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [2,1,1,1] => [1,4] => [1,0,1,1,1,1,0,0,0,0] => 3
([(0,1),(0,2),(0,3),(0,4),(1,2),(1,3),(1,4),(2,3),(2,4),(3,4)],5) => [1,1,1,1,1] => [5] => [1,1,1,1,1,0,0,0,0,0] => 4
([],6) => [6] => [1,1,1,1,1,1] => [1,0,1,0,1,0,1,0,1,0,1,0] => 0
([(4,5)],6) => [5,1] => [1,1,1,1,2] => [1,0,1,0,1,0,1,0,1,1,0,0] => 1
([(3,5),(4,5)],6) => [5,1] => [1,1,1,1,2] => [1,0,1,0,1,0,1,0,1,1,0,0] => 1
([(2,5),(3,5),(4,5)],6) => [5,1] => [1,1,1,1,2] => [1,0,1,0,1,0,1,0,1,1,0,0] => 1
([(1,5),(2,5),(3,5),(4,5)],6) => [5,1] => [1,1,1,1,2] => [1,0,1,0,1,0,1,0,1,1,0,0] => 1
([(0,5),(1,5),(2,5),(3,5),(4,5)],6) => [5,1] => [1,1,1,1,2] => [1,0,1,0,1,0,1,0,1,1,0,0] => 1
([(2,5),(3,4)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(2,5),(3,4),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(1,2),(3,5),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(1,5),(2,5),(3,4),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,1),(2,5),(3,5),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,5),(2,5),(3,4),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(1,5),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,5),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(2,4),(2,5),(3,4),(3,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,5),(1,5),(2,4),(3,4)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(1,5),(2,3),(2,4),(3,5),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,5),(1,5),(2,3),(3,4),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(2,4),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(1,5),(2,4),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,5),(2,4),(3,4),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,5),(1,5),(2,3),(2,4),(3,5),(4,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(1,5),(2,4),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,5),(2,4),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,5),(2,4),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(1,4),(1,5),(2,4),(2,5),(3,4),(3,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,5),(1,4),(2,4),(2,5),(3,4),(3,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,5),(1,4),(1,5),(2,4),(2,5),(3,4),(3,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(1,4),(1,5),(2,4),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,4),(2,4),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,4),(1,5),(2,4),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,4),(0,5),(1,4),(1,5),(2,4),(2,5),(3,4),(3,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,4),(0,5),(1,4),(1,5),(2,4),(2,5),(3,4),(3,5),(4,5)],6) => [4,1,1] => [1,1,1,3] => [1,0,1,0,1,0,1,1,1,0,0,0] => 2
([(0,5),(1,4),(2,3)],6) => [3,3] => [1,1,2,1,1] => [1,0,1,0,1,1,0,0,1,0,1,0] => 3
([(1,5),(2,4),(3,4),(3,5)],6) => [4,2] => [1,1,1,2,1] => [1,0,1,0,1,0,1,1,0,0,1,0] => 2
([(0,1),(2,5),(3,4),(4,5)],6) => [3,3] => [1,1,2,1,1] => [1,0,1,0,1,1,0,0,1,0,1,0] => 3
([(1,2),(3,4),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(0,5),(1,4),(2,3),(3,5),(4,5)],6) => [3,3] => [1,1,2,1,1] => [1,0,1,0,1,1,0,0,1,0,1,0] => 3
([(1,4),(2,3),(2,5),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(0,1),(2,5),(3,4),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(0,4),(1,5),(2,3),(2,5),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(1,4),(1,5),(2,3),(2,5),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(0,5),(1,4),(1,5),(2,3),(2,5),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(1,4),(1,5),(2,3),(2,5),(3,4)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(0,5),(1,4),(2,3),(2,4),(3,5),(4,5)],6) => [3,3] => [1,1,2,1,1] => [1,0,1,0,1,1,0,0,1,0,1,0] => 3
([(1,2),(1,5),(2,4),(3,4),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
([(0,5),(1,2),(1,4),(2,3),(3,5),(4,5)],6) => [3,2,1] => [1,1,2,2] => [1,0,1,0,1,1,0,0,1,1,0,0] => 3
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Description
The maximal i such that the i-th simple module has projective dimension equal to the global dimension in the corresponding Nakayama algebra.
Map
complement
Description
The complement of a composition.
The complement of a composition $I$ is defined as follows:
If $I$ is the empty composition, then the complement is also the empty composition. Otherwise, let $S$ be the descent set corresponding to $I=(i_1,\dots,i_k)$, that is, the subset
$$\{ i_1, i_1 + i_2, \ldots, i_1 + i_2 + \cdots + i_{k-1} \}$$
of $\{ 1, 2, \ldots, |I|-1 \}$. Then, the complement of $I$ is the composition of the same size as $I$, whose descent set is $\{ 1, 2, \ldots, |I|-1 \} \setminus S$.
The complement of a composition $I$ coincides with the reversal (Mp00038reverse) of the composition conjugate (Mp00041conjugate) to $I$.
The complement of a composition $I$ is defined as follows:
If $I$ is the empty composition, then the complement is also the empty composition. Otherwise, let $S$ be the descent set corresponding to $I=(i_1,\dots,i_k)$, that is, the subset
$$\{ i_1, i_1 + i_2, \ldots, i_1 + i_2 + \cdots + i_{k-1} \}$$
of $\{ 1, 2, \ldots, |I|-1 \}$. Then, the complement of $I$ is the composition of the same size as $I$, whose descent set is $\{ 1, 2, \ldots, |I|-1 \} \setminus S$.
The complement of a composition $I$ coincides with the reversal (Mp00038reverse) of the composition conjugate (Mp00041conjugate) to $I$.
Map
chromatic difference sequence
Description
The chromatic difference sequence of a graph.
Let $G$ be a simple graph with chromatic number $\kappa$. Let $\alpha_m$ be the maximum number of vertices in a $m$-colorable subgraph of $G$. Set $\delta_m=\alpha_m-\alpha_{m-1}$. The sequence $\delta_1,\delta_2,\dots\delta_\kappa$ is the chromatic difference sequence of $G$.
All entries of the chromatic difference sequence are positive: $\alpha_m > \alpha_{m-1}$ for $m < \kappa$, because we can assign any uncolored vertex of a partial coloring with $m-1$ colors the color $m$. Therefore, the chromatic difference sequence is a composition of the number of vertices of $G$ into $\kappa$ parts.
Let $G$ be a simple graph with chromatic number $\kappa$. Let $\alpha_m$ be the maximum number of vertices in a $m$-colorable subgraph of $G$. Set $\delta_m=\alpha_m-\alpha_{m-1}$. The sequence $\delta_1,\delta_2,\dots\delta_\kappa$ is the chromatic difference sequence of $G$.
All entries of the chromatic difference sequence are positive: $\alpha_m > \alpha_{m-1}$ for $m < \kappa$, because we can assign any uncolored vertex of a partial coloring with $m-1$ colors the color $m$. Therefore, the chromatic difference sequence is a composition of the number of vertices of $G$ into $\kappa$ parts.
Map
bounce path
Description
The bounce path determined by an integer composition.
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