Arrays of permutations

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Inversion (discrete mathematics) Template:Rdrup
Triangle of possible inversions of 8-element permutations
Permutation 373 from the array below

These are some examples of similar permutations ordered in arrays.

Each permutation is represented by its:

  • place-based inversion set
  • Rothe diagram (including the matrix representation as dots)
  • left-inversion vector (0s represented by dots, the leading 0s omitted)
  • reverse colexicographic index, i.e. the left-inversion vector interpreted as a little-endian factorial number

For the last permutation in each array the corresponding permutation matrix is also shown.


6936
=(124875)(36)
Template:Oeis
20533
=(157842)(36)
Template:Oeis     Chains of transpositions
23616
=(15)(26)(37)(48)
Template:Oeis     Rows of transpositions
5167
=(12)(34)(56)(78)
Template:Oeis     Transpositions     This array corrsponds to the inverted array of 2-element subsets: In place (i,j) is the cycle (j,j+i), e.g. (18) in place (7,1).
36153=(18)

In place (i,j) is the set {i,i+j}.
Template:Oeis     Nested transpositions
40319
=(18)(27)(36)(45)
Template:Oeis     Circular shifts to the left in an interval
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5913
=(18765432)
Error creating thumbnail:
Template:Oeis     Circular shifts to the right in an interval
File:Example permutation matrix; circular shift, right.svg
35280
=(12345678)

Circular shifts to the left,
i.e. permutations whose cycle notation is of the form (1n...32):
Template:Oeis = 0, 1, 3, 9, 33, 153, 873, 5913...

Circular shifts to the right,
i.e. permutations whose cycle notation is of the form (123...n):
Template:Oeis = 0, 1, 4, 18, 96, 600, 4320, 35280...