# A-free Groups and Tree-free Groups

Stochastic Analysis Seminar Series

Abstract: The idea of A-free group, where A is a discrete ordered abelian group, has been introduced by Myasnikov, Remeslennikov and Serbin. It generalises the construction of free groups. A proof will be outlined that a group is A-free for some A if and only if it acts freely and without inversions on a \lambda-tree, where \lambda is an arbitrary ordered abelian group.

 Location: AHL Lecture Theatre, OMI, Eagle House Speaker(s): IAN CHISWELL (Queen Mary University, London) Date: Monday, October 13, 2014 - 15:45 to 16:45