On the uniform spread of almost simple linear groups

Author:

Burness Timothy C.,Guest Simon

Abstract

AbstractLet G be a finite group, and let k be a nonnegative integer. We say that G has uniform spread k if there exists a fixed conjugacy class C in G with the property that for any k nontrivial elements x1,…,xk in G there exists yC such that G = ‹xi,y› for all i. Further, the exact uniform spread of G, denoted by u(G), is the largest k such that G has the uniform spread k property. By a theorem of Breuer, Guralnick, and Kantor, u(G) ≥ 2 for every finite simple group G. Here we consider the uniform spread of almost simple linear groups. Our main theorem states that if G = ‹PSLn (q),g› is almost simple, then u(G) ≥ 2 (unless GS6), and we determine precisely when u(G) tends to infinity as |G| tends to infinity.

Publisher

Cambridge University Press (CUP)

Subject

General Mathematics

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