Geometry & Topology Monographs 14 (2008) 129–133

DOI: 10.2140/gtm.2008.14.129

arXiv: 0904.1384

Abstract

We describe a simple criterion for showing that a group has Serre's property FA. By exhibiting a certain pattern of finite subgroups, we show that this criterion is satisfied by Aut(F_n) and SL(n,Z) when n≥ 3.

Keywords

property FA, automorphisms of free groups, R–trees

Mathematical Subject Classification

Primary: 20E08, 20F65

References

Publication

Received: 20 October 2006
Revised: 26 January 2007
Published: 29 April 2008

Authors