On the longest k-alternating subsequence
Igor Pak, Robin Pemantle

TL;DR
This paper investigates the length of the longest k-alternating subsequence in a random permutation, establishing its asymptotic behavior as approximately two-thirds of (n-k).
Contribution
It provides a new asymptotic result for the length of the longest k-alternating subsequence in random permutations.
Findings
Longest k-alternating subsequence length asymptotic to 2(n-k)/3
Asymptotic behavior established for large permutations
Advances understanding of permutation pattern structures
Abstract
We show that the longest k-alternating substring of a random permutation has length asymptotic to 2 (n-k) / 3.
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Taxonomy
TopicsBayesian Methods and Mixture Models · Stochastic processes and statistical mechanics · Advanced Combinatorial Mathematics
