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Random induced subgraphs of Cayley graphs induced by transpositions

Probability 2011-07-20 v2 Combinatorics

Abstract

In this paper we study random induced subgraphs of Cayley graphs of the symmetric group induced by an arbitrary minimal generating set of transpositions. A random induced subgraph of this Cayley graph is obtained by selecting permutations with independent probability, λn\lambda_n. Our main result is that for any minimal generating set of transpositions, for probabilities λn=1+ϵnn1\lambda_n=\frac{1+\epsilon_n}{n-1} where n1/3+δϵn<1n^{-{1/3}+\delta}\le \epsilon_n<1 and δ>0\delta>0, a random induced subgraph has a.s. a unique largest component of size (ϵn)1+ϵnn1n!\wp(\epsilon_n)\frac{1+\epsilon_n}{n-1}n!, where (ϵn)\wp(\epsilon_n) is the survival probability of a specific branching process.

Keywords

Cite

@article{arxiv.0909.4037,
  title  = {Random induced subgraphs of Cayley graphs induced by transpositions},
  author = {Emma Y. Jin and Christian M. Reidys},
  journal= {arXiv preprint arXiv:0909.4037},
  year   = {2011}
}

Comments

18 pages, 1 figure