Seminar series
Date
Mon, 06 Feb 2012
13:00
13:00
Location
L3
Speaker
Ruth Charney
Organisation
Brandeis
Morgan and Culler proved in the 1980’s that a minimal action of a free group on a tree is
completely determined by its length function. This theorem has been of fundamental importance in the
study of automorphisms of free groups. In particular, it gives rise to a compactification of Culler-Vogtmann's
Outer Space. We prove a 2-dimensional analogue of this theorem for right-angled Artin groups acting on
CAT(0) rectangle complexes. (Joint work with M. Margolis)