Research group
Geometry
Mon, 27 May 2013
14:15
L3

The Pressure metric for convex Anosov representations

Martin Bridgeman
(Boston College)
Abstract

 Using thermodynamic formalism we introduce a notion of intersection for convex Anosov representations. We produce an Out-invariant Riemannian metric on the smooth points of the deformation  space of convex, irreducible representations of a word hyperbolic group G into SL(m,R) whose Zariski closure contains a generic element. In particular, we produce a mapping class group invariant Riemannian metric on Hitchin components which restricts to the Weil-Petersson metric on the Fuchsian locus. 
This is joint work with R. Canary, F. Labourie and A. Sambarino.
Mon, 10 Jun 2013
14:15
L3

tba

tba
Mon, 20 May 2013
14:15
L3

Four-manifolds, surgery and group actions

Ian Hambleton
(McMaster/MPIM Bonn)
Abstract

The talk will survey some results about smooth and topological 4-manifolds obtained via surgery, and discuss some contrasting information provided by gauge theory about smooth finite group actions on 4-manifolds.

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