o:537493 A GEOMETRIC PROOF OF THE STRUCTURE THEOREM FOR CYCLIC SPLITTINGS OF FREE GROUPS en We give a geometric proof of a well known theorem that describes splittings of a free group as an amalgamated product or HNN extension over the integers. The argument generalizes to give a similar description of splittings of a virtually free group over a virtually cyclic group. free group, virtually free group, group splitting 2017-06-30T14:08:55.627Z 44 yes 46 Christopher Cashen application/pdf 416330 http://phaidra.univie.ac.at/o:537493 no yes 1 70 1552253