© The London Mathematical Society
Quasi-Actions on Trees and Property (QFA)
Mathematics Department, MC253-37, California Institute of Technology Pasadena, CA 91125, USA manning{at}caltech.edu
Received 27 February 2004. Revision received 11 August 2004.
We prove some general results about quasi-actions on trees and define Property (QFA), which is analogous to Serre's Property (FA), but in the coarse setting. This property is shown to hold for a class of groups, including SL(n, Z) for n
3. We also give a way of thinking about Property (QFA) by breaking it down into statements about particular classes of trees.