#permutation_class

Permutation class

In the study of permutations and permutation patterns, a permutation class is a set of permutations for which every pattern within a permutation in is also in . In other words, a permutation class is a hereditary property of permutations, or a downset in the permutation pattern order. A permutation class may also be known as a pattern class, closed class, or simply class of permutations.

Wed 26th

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