Stroppel, Markus2011-04-012016-03-312011-04-012016-03-31199234988174Xhttp://nbn-resolving.de/urn:nbn:de:bsz:93-opus-62403http://elib.uni-stuttgart.de/handle/11682/7524http://dx.doi.org/10.18419/opus-7507Freudenthal describes a method to construct an incidence geometry from a group such that the given group acts transitively on the set of flags (incident point-line pairs) of the constructed geometry. This method can be found in [5], too. Here we give a useful generalization to geometries that are not flag-homogeneous. Such geometries occur quite naturally in the study of stable planes.eninfo:eu-repo/semantics/openAccessInzidenzgeometrie , Automorphismengruppe510article