Permutations, moments, measures
Blitvic, Natasha and Steingrimsson, Einar (2020) Permutations, moments, measures. Transactions of the American Mathematical Society, n/a. n/a. ISSN 1088-6850 (https://doi.org/10.1090/tran/8330)
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Abstract
Which combinatorial sequences correspond to moments of probability measures on the real line? We present a generating function, in the form of a continued fraction, for a fourteenparameter family of such sequences and interpret these in terms of combinatorial statistics on the symmetric groups. Special cases include several classical and noncommutative probability laws, along with a substantial subset of the orthogonalizing measures in the q-Askey scheme, now given a new combinatorial interpretation in terms of elementary permutation statistics. This framework further captures a variety of interesting combinatorial sequences including, notably, the moment sequences associated to distributions of the numbers of occurrences of (classical and vincular) permutation patterns of length three. This connection between pattern avoidance and broader ideas in classical and noncommutative probability is among several intriguing new corollaries, which generalize and unify results previously appearing in the literature, while opening up new lines of inquiry. The fourteen combinatorial statistics further generalize to signed and colored permutations, and, as an infinite family of statistics, to the k-arrangements: permutations with k-colored fixed points, introduced here along with several related results and conjectures.
ORCID iDs
Blitvic, Natasha and Steingrimsson, Einar ORCID: https://orcid.org/0000-0003-4611-0849;-
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Item type: Article ID code: 74210 Dates: DateEvent1 December 2020Published1 December 2020Published Online2 October 2020AcceptedSubjects: Science > Mathematics Department: Faculty of Science > Mathematics and Statistics Depositing user: Pure Administrator Date deposited: 12 Oct 2020 13:42 Last modified: 05 Dec 2024 01:18 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/74210