MULTIPLE EXTENSIONS OF GENERALIZED HEXAGONS RELATED TO THE SIMPLE GROUPS MCL AND CO-3

摘要

The groups Met, Co-3 and 2 x Co-3 are all contained in the automorphism group of a 2-, respectively, 3-fold extension of a generalized hexagon of order (4, 1). We give a geometric characterization of these multiple extensions of this generalized hexagon. [References: 10]