Thresholds for patterns in random compositions and random permutations

Student thesis: Doctoral Thesis

Abstract

We explore how the asymptotic structure of a random permutation of [n] with m inversions evolves, as m increases, establishing thresholds for the appearance and disappearance of any classical, consecutive or vincular pattern. Our investigation begins with exploring how the asymptotic structure of a random n-term weak integer composition of m evolves, as m increases from zero. The primary focus of our investigation into compositions is establishing thresholds for the appearance and disappearance of substructures, particularly the appearance and disappearance of consecutive composition patterns. We are then able to transfer the established composition threshold to establish the thresholds for classical, consecutive or vincular permutation patterns occurring within our random permutation model. This thesis is based on the papers [12] and [13].
Date of Award4 Jun 2025
Original languageEnglish
Awarding Institution
  • University Of Strathclyde
SponsorsEPSRC (Engineering and Physical Sciences Research Council)
SupervisorDavid Bevan (Supervisor) & Einar Steingrimsson (Supervisor)

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