Seminar series
Date
Mon, 28 Apr 2014
15:30
15:30
Location
C5
Speaker
Karen Vogtmann
Organisation
Cornell and Warwick
In order to study the group of (outer) automorphisms of
any group G by geometric methods one needs a well-behaved "outer
space" with an interesting action of Out(G). If G is free abelian, the
classic symmetric space SL(n,R)/SO(n) serves this role, and if G is
free non-abelian an appropriate outer space was introduced in the
1980's. I will recall these constructions and then introduce joint
work with Ruth Charney on constructing an outer space for any
right-angled Artin group.