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math.CO2009
Moufang quadrangles of mixed type
Koen Struyve, Hendrik Van Maldeghem
In this paper, we present some geometric characterizations of the Moufang quadrangles of mixed type, i.e., the Moufang quadrangles all the points and lines of which are regular. Ro…
math.CO2008
Intersections of Apartments
Peter Abramenko, Hendrik Van Maldeghem
We show that, if a building is endowed with its complete system of apartments, and if each panel is contained in at least four chambers, then the intersection of two apartments can…
math.CO2007
Primitive flag-transitive generalized hexagons and octagons
Csaba Schneider, Hendrik Van Maldeghem
Suppose that an automorphism group acts flag-transitively on a finite generalized hexagon or octagon $\cS$, and suppose that the action on both the point and line set is primit…