Graphs which are locally Grassmann.
Über Tuttes Cages.
A Geometric Construction of Janko's Group J... .
The Nonexistence of Certain Moufang Polygons.
An existence lemma for groups generated by 3-transpositions.
On the Solution of Volterra Integral Equations of the First Kind.
A characterization of the groups Fi22, Fi23 and F24.
Moufang trees and generalized quadrangles.
Receding polar regions of a spherical building and the center conjecture
We introduce the notion of a polar region of a spherical building and use some simple observations about polar regions to give elementary proofs of various fundamental properties of root groups. We combine some of these observations with results of Timmesfeld, Balser and Lytchak to give a new proof of the center conjecture for convex chamber subcomplexes of thick spherical buildings.
Page 1