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Fixed point ratios in actions of finite exceptional groups of lie type.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published
  • Ross Lawther
  • Martin W. Liebeck
  • Gary M. Seitz
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<mark>Journal publication date</mark>2002
<mark>Journal</mark>Pacific Journal of Mathematics
Issue number2
Volume205
Number of pages72
Pages (from-to)393-464
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Let G be a finite exceptional group of Lie type acting transitively on a set Ø. For x in G, the fixed point ratio of x is the proportion of elements of Ø which are fixed by x. We obtain new bounds for such fixed point ratios. When a point-stabilizer is parabolic we use character theory; and in other cases, we use results on an analogous problem for algebraic groups in Lawther, Liebeck & Seitz, 2002. These give dimension bounds on fixed point spaces of elements of exceptional algebraic groups, which we apply by passing to finite groups via a Frobenius morphism.