Identifier
Mp00058:
Perfect matchings
—to permutation⟶
Permutations
Mp00114: Permutations —connectivity set⟶ Binary words
Mp00278: Binary words —rowmotion⟶ Binary words
Mp00114: Permutations —connectivity set⟶ Binary words
Mp00278: Binary words —rowmotion⟶ Binary words
Images
[(1,2)] => [2,1] => 0 => 0
[(1,2),(3,4)] => [2,1,4,3] => 010 => 100
[(1,3),(2,4)] => [3,4,1,2] => 000 => 000
[(1,4),(2,3)] => [4,3,2,1] => 000 => 000
[(1,2),(3,4),(5,6)] => [2,1,4,3,6,5] => 01010 => 10100
[(1,3),(2,4),(5,6)] => [3,4,1,2,6,5] => 00010 => 00100
[(1,4),(2,3),(5,6)] => [4,3,2,1,6,5] => 00010 => 00100
[(1,5),(2,3),(4,6)] => [5,3,2,6,1,4] => 00000 => 00000
[(1,6),(2,3),(4,5)] => [6,3,2,5,4,1] => 00000 => 00000
[(1,6),(2,4),(3,5)] => [6,4,5,2,3,1] => 00000 => 00000
[(1,5),(2,4),(3,6)] => [5,4,6,2,1,3] => 00000 => 00000
[(1,4),(2,5),(3,6)] => [4,5,6,1,2,3] => 00000 => 00000
[(1,3),(2,5),(4,6)] => [3,5,1,6,2,4] => 00000 => 00000
[(1,2),(3,5),(4,6)] => [2,1,5,6,3,4] => 01000 => 10000
[(1,2),(3,6),(4,5)] => [2,1,6,5,4,3] => 01000 => 10000
[(1,3),(2,6),(4,5)] => [3,6,1,5,4,2] => 00000 => 00000
[(1,4),(2,6),(3,5)] => [4,6,5,1,3,2] => 00000 => 00000
[(1,5),(2,6),(3,4)] => [5,6,4,3,1,2] => 00000 => 00000
[(1,6),(2,5),(3,4)] => [6,5,4,3,2,1] => 00000 => 00000
[(1,2),(3,4),(5,6),(7,8)] => [2,1,4,3,6,5,8,7] => 0101010 => 1010100
[(1,3),(2,4),(5,6),(7,8)] => [3,4,1,2,6,5,8,7] => 0001010 => 0010100
[(1,4),(2,3),(5,6),(7,8)] => [4,3,2,1,6,5,8,7] => 0001010 => 0010100
[(1,5),(2,3),(4,6),(7,8)] => [5,3,2,6,1,4,8,7] => 0000010 => 0000100
[(1,6),(2,3),(4,5),(7,8)] => [6,3,2,5,4,1,8,7] => 0000010 => 0000100
[(1,7),(2,3),(4,5),(6,8)] => [7,3,2,5,4,8,1,6] => 0000000 => 0000000
[(1,8),(2,3),(4,5),(6,7)] => [8,3,2,5,4,7,6,1] => 0000000 => 0000000
[(1,8),(2,4),(3,5),(6,7)] => [8,4,5,2,3,7,6,1] => 0000000 => 0000000
[(1,7),(2,4),(3,5),(6,8)] => [7,4,5,2,3,8,1,6] => 0000000 => 0000000
[(1,6),(2,4),(3,5),(7,8)] => [6,4,5,2,3,1,8,7] => 0000010 => 0000100
[(1,5),(2,4),(3,6),(7,8)] => [5,4,6,2,1,3,8,7] => 0000010 => 0000100
[(1,4),(2,5),(3,6),(7,8)] => [4,5,6,1,2,3,8,7] => 0000010 => 0000100
[(1,3),(2,5),(4,6),(7,8)] => [3,5,1,6,2,4,8,7] => 0000010 => 0000100
[(1,2),(3,5),(4,6),(7,8)] => [2,1,5,6,3,4,8,7] => 0100010 => 1000100
[(1,2),(3,6),(4,5),(7,8)] => [2,1,6,5,4,3,8,7] => 0100010 => 1000100
[(1,3),(2,6),(4,5),(7,8)] => [3,6,1,5,4,2,8,7] => 0000010 => 0000100
[(1,4),(2,6),(3,5),(7,8)] => [4,6,5,1,3,2,8,7] => 0000010 => 0000100
[(1,5),(2,6),(3,4),(7,8)] => [5,6,4,3,1,2,8,7] => 0000010 => 0000100
[(1,6),(2,5),(3,4),(7,8)] => [6,5,4,3,2,1,8,7] => 0000010 => 0000100
[(1,7),(2,5),(3,4),(6,8)] => [7,5,4,3,2,8,1,6] => 0000000 => 0000000
[(1,8),(2,5),(3,4),(6,7)] => [8,5,4,3,2,7,6,1] => 0000000 => 0000000
[(1,8),(2,6),(3,4),(5,7)] => [8,6,4,3,7,2,5,1] => 0000000 => 0000000
[(1,7),(2,6),(3,4),(5,8)] => [7,6,4,3,8,2,1,5] => 0000000 => 0000000
[(1,6),(2,7),(3,4),(5,8)] => [6,7,4,3,8,1,2,5] => 0000000 => 0000000
[(1,5),(2,7),(3,4),(6,8)] => [5,7,4,3,1,8,2,6] => 0000000 => 0000000
[(1,4),(2,7),(3,5),(6,8)] => [4,7,5,1,3,8,2,6] => 0000000 => 0000000
[(1,3),(2,7),(4,5),(6,8)] => [3,7,1,5,4,8,2,6] => 0000000 => 0000000
[(1,2),(3,7),(4,5),(6,8)] => [2,1,7,5,4,8,3,6] => 0100000 => 1000000
[(1,2),(3,8),(4,5),(6,7)] => [2,1,8,5,4,7,6,3] => 0100000 => 1000000
[(1,3),(2,8),(4,5),(6,7)] => [3,8,1,5,4,7,6,2] => 0000000 => 0000000
[(1,4),(2,8),(3,5),(6,7)] => [4,8,5,1,3,7,6,2] => 0000000 => 0000000
[(1,5),(2,8),(3,4),(6,7)] => [5,8,4,3,1,7,6,2] => 0000000 => 0000000
[(1,6),(2,8),(3,4),(5,7)] => [6,8,4,3,7,1,5,2] => 0000000 => 0000000
[(1,7),(2,8),(3,4),(5,6)] => [7,8,4,3,6,5,1,2] => 0000000 => 0000000
[(1,8),(2,7),(3,4),(5,6)] => [8,7,4,3,6,5,2,1] => 0000000 => 0000000
[(1,8),(2,7),(3,5),(4,6)] => [8,7,5,6,3,4,2,1] => 0000000 => 0000000
[(1,7),(2,8),(3,5),(4,6)] => [7,8,5,6,3,4,1,2] => 0000000 => 0000000
[(1,6),(2,8),(3,5),(4,7)] => [6,8,5,7,3,1,4,2] => 0000000 => 0000000
[(1,5),(2,8),(3,6),(4,7)] => [5,8,6,7,1,3,4,2] => 0000000 => 0000000
[(1,4),(2,8),(3,6),(5,7)] => [4,8,6,1,7,3,5,2] => 0000000 => 0000000
[(1,3),(2,8),(4,6),(5,7)] => [3,8,1,6,7,4,5,2] => 0000000 => 0000000
[(1,2),(3,8),(4,6),(5,7)] => [2,1,8,6,7,4,5,3] => 0100000 => 1000000
[(1,2),(3,7),(4,6),(5,8)] => [2,1,7,6,8,4,3,5] => 0100000 => 1000000
[(1,3),(2,7),(4,6),(5,8)] => [3,7,1,6,8,4,2,5] => 0000000 => 0000000
[(1,4),(2,7),(3,6),(5,8)] => [4,7,6,1,8,3,2,5] => 0000000 => 0000000
[(1,5),(2,7),(3,6),(4,8)] => [5,7,6,8,1,3,2,4] => 0000000 => 0000000
[(1,6),(2,7),(3,5),(4,8)] => [6,7,5,8,3,1,2,4] => 0000000 => 0000000
[(1,7),(2,6),(3,5),(4,8)] => [7,6,5,8,3,2,1,4] => 0000000 => 0000000
[(1,8),(2,6),(3,5),(4,7)] => [8,6,5,7,3,2,4,1] => 0000000 => 0000000
[(1,8),(2,5),(3,6),(4,7)] => [8,5,6,7,2,3,4,1] => 0000000 => 0000000
[(1,7),(2,5),(3,6),(4,8)] => [7,5,6,8,2,3,1,4] => 0000000 => 0000000
[(1,6),(2,5),(3,7),(4,8)] => [6,5,7,8,2,1,3,4] => 0000000 => 0000000
[(1,5),(2,6),(3,7),(4,8)] => [5,6,7,8,1,2,3,4] => 0000000 => 0000000
[(1,4),(2,6),(3,7),(5,8)] => [4,6,7,1,8,2,3,5] => 0000000 => 0000000
[(1,3),(2,6),(4,7),(5,8)] => [3,6,1,7,8,2,4,5] => 0000000 => 0000000
[(1,2),(3,6),(4,7),(5,8)] => [2,1,6,7,8,3,4,5] => 0100000 => 1000000
[(1,2),(3,5),(4,7),(6,8)] => [2,1,5,7,3,8,4,6] => 0100000 => 1000000
[(1,3),(2,5),(4,7),(6,8)] => [3,5,1,7,2,8,4,6] => 0000000 => 0000000
[(1,4),(2,5),(3,7),(6,8)] => [4,5,7,1,2,8,3,6] => 0000000 => 0000000
[(1,5),(2,4),(3,7),(6,8)] => [5,4,7,2,1,8,3,6] => 0000000 => 0000000
[(1,6),(2,4),(3,7),(5,8)] => [6,4,7,2,8,1,3,5] => 0000000 => 0000000
[(1,7),(2,4),(3,6),(5,8)] => [7,4,6,2,8,3,1,5] => 0000000 => 0000000
[(1,8),(2,4),(3,6),(5,7)] => [8,4,6,2,7,3,5,1] => 0000000 => 0000000
[(1,8),(2,3),(4,6),(5,7)] => [8,3,2,6,7,4,5,1] => 0000000 => 0000000
[(1,7),(2,3),(4,6),(5,8)] => [7,3,2,6,8,4,1,5] => 0000000 => 0000000
[(1,6),(2,3),(4,7),(5,8)] => [6,3,2,7,8,1,4,5] => 0000000 => 0000000
[(1,5),(2,3),(4,7),(6,8)] => [5,3,2,7,1,8,4,6] => 0000000 => 0000000
[(1,4),(2,3),(5,7),(6,8)] => [4,3,2,1,7,8,5,6] => 0001000 => 0010000
[(1,3),(2,4),(5,7),(6,8)] => [3,4,1,2,7,8,5,6] => 0001000 => 0010000
[(1,2),(3,4),(5,7),(6,8)] => [2,1,4,3,7,8,5,6] => 0101000 => 1010000
[(1,2),(3,4),(5,8),(6,7)] => [2,1,4,3,8,7,6,5] => 0101000 => 1010000
[(1,3),(2,4),(5,8),(6,7)] => [3,4,1,2,8,7,6,5] => 0001000 => 0010000
[(1,4),(2,3),(5,8),(6,7)] => [4,3,2,1,8,7,6,5] => 0001000 => 0010000
[(1,5),(2,3),(4,8),(6,7)] => [5,3,2,8,1,7,6,4] => 0000000 => 0000000
[(1,6),(2,3),(4,8),(5,7)] => [6,3,2,8,7,1,5,4] => 0000000 => 0000000
[(1,7),(2,3),(4,8),(5,6)] => [7,3,2,8,6,5,1,4] => 0000000 => 0000000
[(1,8),(2,3),(4,7),(5,6)] => [8,3,2,7,6,5,4,1] => 0000000 => 0000000
[(1,8),(2,4),(3,7),(5,6)] => [8,4,7,2,6,5,3,1] => 0000000 => 0000000
[(1,7),(2,4),(3,8),(5,6)] => [7,4,8,2,6,5,1,3] => 0000000 => 0000000
[(1,6),(2,4),(3,8),(5,7)] => [6,4,8,2,7,1,5,3] => 0000000 => 0000000
[(1,5),(2,4),(3,8),(6,7)] => [5,4,8,2,1,7,6,3] => 0000000 => 0000000
[(1,4),(2,5),(3,8),(6,7)] => [4,5,8,1,2,7,6,3] => 0000000 => 0000000
>>> Load all 265 entries. <<<Map
to permutation
Description
Returns the fixed point free involution whose transpositions are the pairs in the perfect matching.
Map
connectivity set
Description
The connectivity set of a permutation as a binary word.
According to [2], also known as the global ascent set.
The connectivity set is
$$C(\pi)=\{i\in [n-1] | \forall 1 \leq j \leq i < k \leq n : \pi(j) < \pi(k)\}.$$
For $n > 1$ it can also be described as the set of occurrences of the mesh pattern
$$([1,2], \{(0,2),(1,0),(1,1),(2,0),(2,1) \})$$
or equivalently
$$([1,2], \{(0,1),(0,2),(1,1),(1,2),(2,0) \}),$$
see [3].
The permutation is connected, when the connectivity set is empty.
According to [2], also known as the global ascent set.
The connectivity set is
$$C(\pi)=\{i\in [n-1] | \forall 1 \leq j \leq i < k \leq n : \pi(j) < \pi(k)\}.$$
For $n > 1$ it can also be described as the set of occurrences of the mesh pattern
$$([1,2], \{(0,2),(1,0),(1,1),(2,0),(2,1) \})$$
or equivalently
$$([1,2], \{(0,1),(0,2),(1,1),(1,2),(2,0) \}),$$
see [3].
The permutation is connected, when the connectivity set is empty.
Map
rowmotion
Description
Return the rowmotion of the binary word, regarded as an order ideal in the product of two chains.
In particular, this operation preserves the number of ones, and its order is the length of the word, see section 3.3 of [1].
In particular, this operation preserves the number of ones, and its order is the length of the word, see section 3.3 of [1].
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