Asymptotic normality of consecutive patterns in permutations encoded by generating trees with one‐dimensional labels. Issue 3 (20th March 2021)

• Record Type: Journal Article
• Authors: Borga, Jacopo
• Is Part Of: Random structures & algorithms. Volume 59:Issue 3(2021)
• Page Start: 339
• Page End: 375
• Publication Date: 2021-03-20
• Subjects: Central limit theorems -- local weak limits -- random permutations -- permutation patterns -- conditioned random walks; Random graphs -- Periodicals; Mathematical analysis -- Periodicals; 519
• DOI: 10.1002/rsa.21005
• Languages: English
• ISSNs: 1042-9832

Abstract

Abstract: We consider uniform random permutations drawn from a family enumerated through generating trees. We develop a new general technique to establish a central limit theorem for the number of consecutive occurrences of a fixed pattern in such permutations. We propose a technique to sample uniform permutations in such families as conditioned random colored walks. Building on that, we derive the behavior of the consecutive patterns in random permutations studying properties of the consecutive increments in the corresponding random walks. The method applies to families of permutations with a one‐dimensional‐labeled generating tree (together with some technical assumptions) and implies local convergence for random permutations in such families. We exhibit ten different families of permutations, most of them being permutation classes, that satisfy our assumptions. To the best of our knowledge, this is the first work where generating trees—which were introduced to enumerate combinatorial objects—have been used to establish probabilistic results.