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Matching statistic: St001892
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St001892: Signed permutations ⟶ ℤResult quality: 100% ●values known / values provided: 100%●distinct values known / distinct values provided: 100%
Values
[1] => 0
[-1] => 1
[1,2] => 0
[1,-2] => 1
[-1,2] => 1
[-1,-2] => 2
[2,1] => 2
[2,-1] => 3
[-2,1] => 1
[-2,-1] => 2
[1,2,3] => 0
[1,2,-3] => 1
[1,-2,3] => 1
[1,-2,-3] => 2
[-1,2,3] => 1
[-1,2,-3] => 2
[-1,-2,3] => 2
[-1,-2,-3] => 3
[1,3,2] => 2
[1,3,-2] => 3
[1,-3,2] => 1
[1,-3,-2] => 2
[-1,3,2] => 3
[-1,3,-2] => 4
[-1,-3,2] => 2
[-1,-3,-2] => 3
[2,1,3] => 2
[2,1,-3] => 3
[2,-1,3] => 3
[2,-1,-3] => 4
[-2,1,3] => 1
[-2,1,-3] => 2
[-2,-1,3] => 2
[-2,-1,-3] => 3
[2,3,1] => 4
[2,3,-1] => 5
[2,-3,1] => 3
[2,-3,-1] => 4
[-2,3,1] => 3
[-2,3,-1] => 4
[-2,-3,1] => 2
[-2,-3,-1] => 3
[3,1,2] => 2
[3,1,-2] => 3
[3,-1,2] => 3
[3,-1,-2] => 4
[-3,1,2] => 1
[-3,1,-2] => 2
[-3,-1,2] => 2
[-3,-1,-2] => 3
Description
The flag excedance statistic of a signed permutation.
This is the number of negative entries plus twice the number of excedances of the signed permutation. That is,
$$fexc(\sigma) = 2exc(\sigma) + neg(\sigma),$$
where
$$exc(\sigma) = |\{i \in [n-1] \,:\, \sigma(i) > i\}|$$
$$neg(\sigma) = |\{i \in [n] \,:\, \sigma(i) < 0\}|$$
It has the same distribution as the flag descent statistic.
Matching statistic: St001817
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(load all 4 compositions to match this statistic)
Mp00168: Signed permutations —Kreweras complement⟶ Signed permutations
Mp00161: Signed permutations —reverse⟶ Signed permutations
Mp00188: Signed permutations —complement⟶ Signed permutations
St001817: Signed permutations ⟶ ℤResult quality: 53% ●values known / values provided: 53%●distinct values known / distinct values provided: 100%
Mp00161: Signed permutations —reverse⟶ Signed permutations
Mp00188: Signed permutations —complement⟶ Signed permutations
St001817: Signed permutations ⟶ ℤResult quality: 53% ●values known / values provided: 53%●distinct values known / distinct values provided: 100%
Values
[1] => [-1] => [-1] => [-1] => 1 = 0 + 1
[-1] => [1] => [1] => [1] => 2 = 1 + 1
[1,2] => [2,-1] => [-1,2] => [-2,1] => 1 = 0 + 1
[1,-2] => [2,1] => [1,2] => [2,1] => 2 = 1 + 1
[-1,2] => [-2,-1] => [-1,-2] => [-2,-1] => 2 = 1 + 1
[-1,-2] => [-2,1] => [1,-2] => [2,-1] => 3 = 2 + 1
[2,1] => [-1,2] => [2,-1] => [1,-2] => 3 = 2 + 1
[2,-1] => [1,2] => [2,1] => [1,2] => 4 = 3 + 1
[-2,1] => [-1,-2] => [-2,-1] => [-1,-2] => 2 = 1 + 1
[-2,-1] => [1,-2] => [-2,1] => [-1,2] => 3 = 2 + 1
[1,2,3] => [2,3,-1] => [-1,3,2] => [-3,1,2] => 1 = 0 + 1
[1,2,-3] => [2,3,1] => [1,3,2] => [3,1,2] => 2 = 1 + 1
[1,-2,3] => [2,-3,-1] => [-1,-3,2] => [-3,-1,2] => 2 = 1 + 1
[1,-2,-3] => [2,-3,1] => [1,-3,2] => [3,-1,2] => 3 = 2 + 1
[-1,2,3] => [-2,3,-1] => [-1,3,-2] => [-3,1,-2] => 2 = 1 + 1
[-1,2,-3] => [-2,3,1] => [1,3,-2] => [3,1,-2] => 3 = 2 + 1
[-1,-2,3] => [-2,-3,-1] => [-1,-3,-2] => [-3,-1,-2] => 3 = 2 + 1
[-1,-2,-3] => [-2,-3,1] => [1,-3,-2] => [3,-1,-2] => 4 = 3 + 1
[1,3,2] => [2,-1,3] => [3,-1,2] => [1,-3,2] => 3 = 2 + 1
[1,3,-2] => [2,1,3] => [3,1,2] => [1,3,2] => 4 = 3 + 1
[1,-3,2] => [2,-1,-3] => [-3,-1,2] => [-1,-3,2] => 2 = 1 + 1
[1,-3,-2] => [2,1,-3] => [-3,1,2] => [-1,3,2] => 3 = 2 + 1
[-1,3,2] => [-2,-1,3] => [3,-1,-2] => [1,-3,-2] => 4 = 3 + 1
[-1,3,-2] => [-2,1,3] => [3,1,-2] => [1,3,-2] => 5 = 4 + 1
[-1,-3,2] => [-2,-1,-3] => [-3,-1,-2] => [-1,-3,-2] => 3 = 2 + 1
[-1,-3,-2] => [-2,1,-3] => [-3,1,-2] => [-1,3,-2] => 4 = 3 + 1
[2,1,3] => [3,2,-1] => [-1,2,3] => [-3,2,1] => 3 = 2 + 1
[2,1,-3] => [3,2,1] => [1,2,3] => [3,2,1] => 4 = 3 + 1
[2,-1,3] => [-3,2,-1] => [-1,2,-3] => [-3,2,-1] => 4 = 3 + 1
[2,-1,-3] => [-3,2,1] => [1,2,-3] => [3,2,-1] => 5 = 4 + 1
[-2,1,3] => [3,-2,-1] => [-1,-2,3] => [-3,-2,1] => 2 = 1 + 1
[-2,1,-3] => [3,-2,1] => [1,-2,3] => [3,-2,1] => 3 = 2 + 1
[-2,-1,3] => [-3,-2,-1] => [-1,-2,-3] => [-3,-2,-1] => 3 = 2 + 1
[-2,-1,-3] => [-3,-2,1] => [1,-2,-3] => [3,-2,-1] => 4 = 3 + 1
[2,3,1] => [-1,2,3] => [3,2,-1] => [1,2,-3] => 5 = 4 + 1
[2,3,-1] => [1,2,3] => [3,2,1] => [1,2,3] => 6 = 5 + 1
[2,-3,1] => [-1,2,-3] => [-3,2,-1] => [-1,2,-3] => 4 = 3 + 1
[2,-3,-1] => [1,2,-3] => [-3,2,1] => [-1,2,3] => 5 = 4 + 1
[-2,3,1] => [-1,-2,3] => [3,-2,-1] => [1,-2,-3] => 4 = 3 + 1
[-2,3,-1] => [1,-2,3] => [3,-2,1] => [1,-2,3] => 5 = 4 + 1
[-2,-3,1] => [-1,-2,-3] => [-3,-2,-1] => [-1,-2,-3] => 3 = 2 + 1
[-2,-3,-1] => [1,-2,-3] => [-3,-2,1] => [-1,-2,3] => 4 = 3 + 1
[3,1,2] => [3,-1,2] => [2,-1,3] => [2,-3,1] => 3 = 2 + 1
[3,1,-2] => [3,1,2] => [2,1,3] => [2,3,1] => 4 = 3 + 1
[3,-1,2] => [-3,-1,2] => [2,-1,-3] => [2,-3,-1] => 4 = 3 + 1
[3,-1,-2] => [-3,1,2] => [2,1,-3] => [2,3,-1] => 5 = 4 + 1
[-3,1,2] => [3,-1,-2] => [-2,-1,3] => [-2,-3,1] => 2 = 1 + 1
[-3,1,-2] => [3,1,-2] => [-2,1,3] => [-2,3,1] => 3 = 2 + 1
[-3,-1,2] => [-3,-1,-2] => [-2,-1,-3] => [-2,-3,-1] => 3 = 2 + 1
[-3,-1,-2] => [-3,1,-2] => [-2,1,-3] => [-2,3,-1] => 4 = 3 + 1
[1,2,3,4,5] => [2,3,4,5,-1] => [-1,5,4,3,2] => [-5,1,2,3,4] => ? = 0 + 1
[1,2,3,4,-5] => [2,3,4,5,1] => [1,5,4,3,2] => [5,1,2,3,4] => ? = 1 + 1
[1,2,3,-4,5] => [2,3,4,-5,-1] => [-1,-5,4,3,2] => [-5,-1,2,3,4] => ? = 1 + 1
[1,2,3,-4,-5] => [2,3,4,-5,1] => [1,-5,4,3,2] => [5,-1,2,3,4] => ? = 2 + 1
[1,2,-3,4,5] => [2,3,-4,5,-1] => [-1,5,-4,3,2] => [-5,1,-2,3,4] => ? = 1 + 1
[1,2,-3,4,-5] => [2,3,-4,5,1] => [1,5,-4,3,2] => [5,1,-2,3,4] => ? = 2 + 1
[1,2,-3,-4,5] => [2,3,-4,-5,-1] => [-1,-5,-4,3,2] => [-5,-1,-2,3,4] => ? = 2 + 1
[1,2,-3,-4,-5] => [2,3,-4,-5,1] => [1,-5,-4,3,2] => [5,-1,-2,3,4] => ? = 3 + 1
[1,-2,3,4,5] => [2,-3,4,5,-1] => [-1,5,4,-3,2] => [-5,1,2,-3,4] => ? = 1 + 1
[1,-2,3,4,-5] => [2,-3,4,5,1] => [1,5,4,-3,2] => [5,1,2,-3,4] => ? = 2 + 1
[1,-2,3,-4,5] => [2,-3,4,-5,-1] => [-1,-5,4,-3,2] => [-5,-1,2,-3,4] => ? = 2 + 1
[1,-2,3,-4,-5] => [2,-3,4,-5,1] => [1,-5,4,-3,2] => [5,-1,2,-3,4] => ? = 3 + 1
[1,-2,-3,4,5] => [2,-3,-4,5,-1] => [-1,5,-4,-3,2] => [-5,1,-2,-3,4] => ? = 2 + 1
[1,-2,-3,4,-5] => [2,-3,-4,5,1] => [1,5,-4,-3,2] => [5,1,-2,-3,4] => ? = 3 + 1
[1,-2,-3,-4,5] => [2,-3,-4,-5,-1] => [-1,-5,-4,-3,2] => [-5,-1,-2,-3,4] => ? = 3 + 1
[1,-2,-3,-4,-5] => [2,-3,-4,-5,1] => [1,-5,-4,-3,2] => [5,-1,-2,-3,4] => ? = 4 + 1
[-1,2,3,4,5] => [-2,3,4,5,-1] => [-1,5,4,3,-2] => [-5,1,2,3,-4] => ? = 1 + 1
[-1,2,3,4,-5] => [-2,3,4,5,1] => [1,5,4,3,-2] => [5,1,2,3,-4] => ? = 2 + 1
[-1,2,3,-4,5] => [-2,3,4,-5,-1] => [-1,-5,4,3,-2] => [-5,-1,2,3,-4] => ? = 2 + 1
[-1,2,3,-4,-5] => [-2,3,4,-5,1] => [1,-5,4,3,-2] => [5,-1,2,3,-4] => ? = 3 + 1
[-1,2,-3,4,5] => [-2,3,-4,5,-1] => [-1,5,-4,3,-2] => [-5,1,-2,3,-4] => ? = 2 + 1
[-1,2,-3,4,-5] => [-2,3,-4,5,1] => [1,5,-4,3,-2] => [5,1,-2,3,-4] => ? = 3 + 1
[-1,2,-3,-4,5] => [-2,3,-4,-5,-1] => [-1,-5,-4,3,-2] => [-5,-1,-2,3,-4] => ? = 3 + 1
[-1,2,-3,-4,-5] => [-2,3,-4,-5,1] => [1,-5,-4,3,-2] => [5,-1,-2,3,-4] => ? = 4 + 1
[-1,-2,3,4,5] => [-2,-3,4,5,-1] => [-1,5,4,-3,-2] => [-5,1,2,-3,-4] => ? = 2 + 1
[-1,-2,3,4,-5] => [-2,-3,4,5,1] => [1,5,4,-3,-2] => [5,1,2,-3,-4] => ? = 3 + 1
[-1,-2,3,-4,5] => [-2,-3,4,-5,-1] => [-1,-5,4,-3,-2] => [-5,-1,2,-3,-4] => ? = 3 + 1
[-1,-2,3,-4,-5] => [-2,-3,4,-5,1] => [1,-5,4,-3,-2] => [5,-1,2,-3,-4] => ? = 4 + 1
[-1,-2,-3,4,5] => [-2,-3,-4,5,-1] => [-1,5,-4,-3,-2] => [-5,1,-2,-3,-4] => ? = 3 + 1
[-1,-2,-3,4,-5] => [-2,-3,-4,5,1] => [1,5,-4,-3,-2] => [5,1,-2,-3,-4] => ? = 4 + 1
[-1,-2,-3,-4,5] => [-2,-3,-4,-5,-1] => [-1,-5,-4,-3,-2] => [-5,-1,-2,-3,-4] => ? = 4 + 1
[-1,-2,-3,-4,-5] => [-2,-3,-4,-5,1] => [1,-5,-4,-3,-2] => [5,-1,-2,-3,-4] => ? = 5 + 1
[1,2,4,3,5] => [2,3,5,4,-1] => [-1,4,5,3,2] => [-5,2,1,3,4] => ? = 2 + 1
[1,2,4,3,-5] => [2,3,5,4,1] => [1,4,5,3,2] => [5,2,1,3,4] => ? = 3 + 1
[1,2,4,-3,5] => [2,3,-5,4,-1] => [-1,4,-5,3,2] => [-5,2,-1,3,4] => ? = 3 + 1
[1,2,4,-3,-5] => [2,3,-5,4,1] => [1,4,-5,3,2] => [5,2,-1,3,4] => ? = 4 + 1
[1,2,-4,3,5] => [2,3,5,-4,-1] => [-1,-4,5,3,2] => [-5,-2,1,3,4] => ? = 1 + 1
[1,2,-4,3,-5] => [2,3,5,-4,1] => [1,-4,5,3,2] => [5,-2,1,3,4] => ? = 2 + 1
[1,2,-4,-3,5] => [2,3,-5,-4,-1] => [-1,-4,-5,3,2] => [-5,-2,-1,3,4] => ? = 2 + 1
[1,2,-4,-3,-5] => [2,3,-5,-4,1] => [1,-4,-5,3,2] => [5,-2,-1,3,4] => ? = 3 + 1
[1,-2,4,3,5] => [2,-3,5,4,-1] => [-1,4,5,-3,2] => [-5,2,1,-3,4] => ? = 3 + 1
[1,-2,4,3,-5] => [2,-3,5,4,1] => [1,4,5,-3,2] => [5,2,1,-3,4] => ? = 4 + 1
[1,-2,4,-3,5] => [2,-3,-5,4,-1] => [-1,4,-5,-3,2] => [-5,2,-1,-3,4] => ? = 4 + 1
[1,-2,4,-3,-5] => [2,-3,-5,4,1] => [1,4,-5,-3,2] => [5,2,-1,-3,4] => ? = 5 + 1
[1,-2,-4,3,5] => [2,-3,5,-4,-1] => [-1,-4,5,-3,2] => [-5,-2,1,-3,4] => ? = 2 + 1
[1,-2,-4,3,-5] => [2,-3,5,-4,1] => [1,-4,5,-3,2] => [5,-2,1,-3,4] => ? = 3 + 1
[1,-2,-4,-3,5] => [2,-3,-5,-4,-1] => [-1,-4,-5,-3,2] => [-5,-2,-1,-3,4] => ? = 3 + 1
[1,-2,-4,-3,-5] => [2,-3,-5,-4,1] => [1,-4,-5,-3,2] => [5,-2,-1,-3,4] => ? = 4 + 1
[-1,2,4,3,5] => [-2,3,5,4,-1] => [-1,4,5,3,-2] => [-5,2,1,3,-4] => ? = 3 + 1
[-1,2,4,3,-5] => [-2,3,5,4,1] => [1,4,5,3,-2] => [5,2,1,3,-4] => ? = 4 + 1
Description
The number of flag weak exceedances of a signed permutation.
This is the number of negative entries plus twice the number of weak exceedances of the signed permutation.
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