English

Random generation with cycle type restrictions

Combinatorics 2021-07-20 v1 Group Theory

Abstract

We study random generation in the symmetric group when cycle type restrictions are imposed. Given π,πSn\pi, \pi' \in S_n, we prove that π\pi and a random conjugate of π\pi' are likely to generate at least AnA_n provided only that π\pi and π\pi' have not too many fixed points and not too many 22-cycles. As an application, we investigate the following question: For which positive integers mm should we expect two random elements of order mm to generate AnA_n? Among other things, we give a positive answer for any mm having any divisor dd in the range 3do(n1/2)3 \leq d \leq o(n^{1/2}).

Cite

@article{arxiv.1904.12180,
  title  = {Random generation with cycle type restrictions},
  author = {Sean Eberhard and Daniele Garzoni},
  journal= {arXiv preprint arXiv:1904.12180},
  year   = {2021}
}

Comments

25 pages, 2 figures

R2 v1 2026-06-23T08:51:13.325Z