{"version":"1.0","type":"link","title":"Permutation class - Newikis","description":"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…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}