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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…
math.GT2007
Intransitive geometries
Ralf Köhl, Hendrik Van Maldeghem
A lemma of Tits establishes a connection between the simple connectivity of an incidence geometry and the universal completion of an amalgam induced by a sufficiently transitive gr…