%0 Journal Article
%T Geometric characterizations of virtually free groups
%A VšȘtor ArašČjo
%A Pedro V. Silva
%J Mathematics
%D 2014
%I arXiv
%X Four geometric conditions on a geodesic metric space, which are stronger variants of classical conditions characterizing hyperbolicity, are proved to be equivalent. In the particular case of the Cayley graph of a finitely generated group, it is shown that they characterize virtually free groups.
%U http://arxiv.org/abs/1405.5400v1