Almost Invariant Sets

Abstract

A short proof of a conjecture of Kropholler is given. This gives a relative version of Stallings' Theorem on the structure of groups with more than one end. A generalisation of the Almost Stability Theorem is also obtained, that gives information about the structure of the Sageev cubing.

13 pages, 3 figures

References in corpus (1)

• Relative Ends, l^2 Invariants and Property (T)