Point-primitive generalised hexagons and octagons
Combinatorics
2014-10-14 v1 Group Theory
Abstract
In 2008, Schneider and Van Maldeghem proved that if a group acts flag-transitively, point-primitively, and line-primitively on a generalised hexagon or generalised octagon, then it is an almost simple group of Lie type. We show that point-primitivity is sufficient for the same conclusion, regardless of the action on lines or flags. This result narrows the search for generalised hexagons or octagons with point- or line-primitive collineation groups beyond the classical examples, namely the two generalised hexagons and one generalised octagon admitting the Lie type groups , , and , respectively.
Keywords
Cite
@article{arxiv.1410.3423,
title = {Point-primitive generalised hexagons and octagons},
author = {John Bamberg and S. P. Glasby and Tomasz Popiel and Cheryl E. Praeger and Csaba Schneider},
journal= {arXiv preprint arXiv:1410.3423},
year = {2014}
}