3 citations · 7 across the 25 of their papers we have counts for
29 papers
Optimally pseudorandom -free graphs
Jie Han, Ferdinand Ihringer, Hendrik Van Maldeghem
We show that optimally pseudorandom -free graphs of order and degree exist by constructing a graph in the split Cayley hexagon, matching the known upper b…
The natural embedding of the Ree-Tits Octagon
Sebastian Petit, Hendrik Van Maldeghem
In this paper, we study and characterise the natural embedding of the Ree-Tits octagons. Keywords: Ree-Tits Octagon, Metasymplectic space, generalised octagon, generalised polygon
Lines and Opposition in Lie Incidence Geometries of Exceptional Type
Sira Busch, Hendrik Van Maldeghem
We characterise sets of points of exceptional Lie incidence geometries, that is, the natural geometries arising from spherical buildings of exceptional types , $\math…
A Characterization of Lines in Finite Lie Incidence Geometries of Classical Type
Sira Busch, Hendrik Van Maldeghem
We consider any classical Grassmannian geometry ; that is, any projective or polar Grassmann space. Suppose every line in contains points. Then we classify all sets of…
Groups of Projectivities and Levi Subgroups in Spherical Buildings of Simply Laced Type
Sira Busch, Jeroen Schillewaert, Hendrik Van Maldeghem
We introduce the special and general projectivity groups attached to a simplex of a thick irreducible spherical building of simply laced type. If the residue of is irreduci…
Uniclass automorphisms of spherical buildings
Yannick Neyt, James Parkinson, Hendrik Van Maldeghem
An automorphism of a building is called uniclass if the Weyl distance between any chamber and its image lies in a single (twisted) conjugacy class of the Coxeter group. In this pap…