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A Class of Automorphism Groups of Polygonal Complexes
wiatkowski11 Instytut Matematyczny, Uniwersytet Wroclawski, pl. Grunwaldzki 2/4, 50-384 Wroclaw, Poland. Email: swiatkow@math.uni.wroc.pl
In this paper we construct a class of groups together with their actions on certain spaces called polygonal complexes. We give a complete description of the class of all groups which act by automorphisms simply transitively on the oriented edges of non-positively curved polygonal complexes. This family of group actions is very natural from a geometrical viewpoint, being a kind of higher-dimensional analogue of the actions of groups on their Cayley graphs (which are simply transitive on vertices). The construction is based on the notion of a non-positively curved orbihedron and its fundamental group and generalizes the ideas of Ballmann and the author [2].