Identifier
- St000652: Permutations ⟶ ℤ
Values
[1,2] => 1
[2,1] => -1
[1,2,3] => 1
[1,3,2] => 2
[2,1,3] => 2
[2,3,1] => 1
[3,1,2] => 1
[3,2,1] => -1
[1,2,3,4] => 1
[1,2,4,3] => 2
[1,3,2,4] => 2
[1,3,4,2] => 2
[1,4,2,3] => 3
[1,4,3,2] => 3
[2,1,3,4] => 2
[2,1,4,3] => 3
[2,3,1,4] => 3
[2,3,4,1] => 1
[2,4,1,3] => 2
[2,4,3,1] => 2
[3,1,2,4] => 2
[3,1,4,2] => 3
[3,2,1,4] => 3
[3,2,4,1] => 2
[3,4,1,2] => 1
[3,4,2,1] => 1
[4,1,2,3] => 1
[4,1,3,2] => 2
[4,2,1,3] => 2
[4,2,3,1] => 1
[4,3,1,2] => 1
[4,3,2,1] => -1
[1,2,3,4,5] => 1
[1,2,3,5,4] => 2
[1,2,4,3,5] => 2
[1,2,4,5,3] => 2
[1,2,5,3,4] => 3
[1,2,5,4,3] => 3
[1,3,2,4,5] => 2
[1,3,2,5,4] => 3
[1,3,4,2,5] => 3
[1,3,4,5,2] => 2
[1,3,5,2,4] => 2
[1,3,5,4,2] => 2
[1,4,2,3,5] => 3
[1,4,2,5,3] => 3
[1,4,3,2,5] => 3
[1,4,3,5,2] => 3
[1,4,5,2,3] => 3
[1,4,5,3,2] => 3
[1,5,2,3,4] => 4
[1,5,2,4,3] => 4
[1,5,3,2,4] => 4
[1,5,3,4,2] => 4
[1,5,4,2,3] => 4
[1,5,4,3,2] => 4
[2,1,3,4,5] => 2
[2,1,3,5,4] => 2
[2,1,4,3,5] => 3
[2,1,4,5,3] => 3
[2,1,5,3,4] => 4
[2,1,5,4,3] => 4
[2,3,1,4,5] => 3
[2,3,1,5,4] => 4
[2,3,4,1,5] => 4
[2,3,4,5,1] => 1
[2,3,5,1,4] => 3
[2,3,5,4,1] => 2
[2,4,1,3,5] => 2
[2,4,1,5,3] => 4
[2,4,3,1,5] => 4
[2,4,3,5,1] => 2
[2,4,5,1,3] => 2
[2,4,5,3,1] => 2
[2,5,1,3,4] => 3
[2,5,1,4,3] => 3
[2,5,3,1,4] => 3
[2,5,3,4,1] => 3
[2,5,4,1,3] => 3
[2,5,4,3,1] => 3
[3,1,2,4,5] => 2
[3,1,2,5,4] => 3
[3,1,4,2,5] => 3
[3,1,4,5,2] => 3
[3,1,5,2,4] => 4
[3,1,5,4,2] => 4
[3,2,1,4,5] => 3
[3,2,1,5,4] => 4
[3,2,4,1,5] => 4
[3,2,4,5,1] => 2
[3,2,5,1,4] => 3
[3,2,5,4,1] => 3
[3,4,1,2,5] => 3
[3,4,1,5,2] => 4
[3,4,2,1,5] => 4
[3,4,2,5,1] => 3
[3,4,5,1,2] => 1
[3,4,5,2,1] => 1
[3,5,1,2,4] => 2
[3,5,1,4,2] => 3
[3,5,2,1,4] => 3
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Description
The maximal difference between successive positions of a permutation.
This is $\max_i \sigma_{i+1}-\sigma_i$, and therefore never attains the value $0$.
This is $\max_i \sigma_{i+1}-\sigma_i$, and therefore never attains the value $0$.
Code
def statistic(s):
return max([f-e for e,f in zip(s, s[1:])])
Created
Nov 21, 2016 at 20:49 by Martin Rubey
Updated
Nov 21, 2016 at 20:49 by Martin Rubey
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