24 citations · 29 across the 6 of their papers we have counts for
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math.CO2007★ 1 cited
The sphericity of the complex of non-degenerate subspaces
Alice Devillers, Ralf Köhl, Bernhard Muhlherr
We prove that the complex of proper non-trivial non-degenerate subspaces of a finite-dimensional vector space endowed with a non-degenerate sesquilinear form is homotopy equivalent…
math.GR2007★ 1 cited
Intransitive geometries and fused amalgams
Ralf Köhl, Max Horn, Antonio Pasini +1
We study geometries that arise from the natural action on the geometry of one-dimensional subspaces, of nonsingular two-dimensional subspaces, and of nonsingular three-dim…