Generalised polygons admitting a point-primitive almost simple group of Suzuki or Ree type

preprint2015arXivOpen access

Abstract

Let GG be a collineation group of a thick finite generalised hexagon or generalised octagon ΓΓ. If GG acts primitively on the points of ΓΓ, then a recent result of Bamberg et al. shows that GG must be an almost simple group of Lie type. We show that, furthermore, the minimal normal subgroup SS of GG cannot be a Suzuki group or a Ree group of type 2G2^2\text{G}_2, and that if SS is a Ree group of type 2F4^2\text{F}_4, then ΓΓ is (up to point--line duality) the classical Ree--Tits generalised octagon.

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