Topology Seminar: Lars Louder

  • Date: 03/28/2012
Lecturer(s):
Lars Louder
Location: 

University of British Columbia

Topic: 

Strong accessibility of torsion free (relatively) hyperbolic groups

Description: 

Abstract

 

Let G be a finitely presented group. If the process of iteratively passing to vertex groups in a maximal graph of groups decomposition of G over finite subgroups, and then to vertex groups in maximal decompositions of the factors over two-ended subgroups, terminates, we say that G is strongly accessible. Delzant and Potyagailo argue that this process always terminates for certain types of splittings of finitely presented groups, in particular hyperbolic groups without two-torsion. I will give an example showing that their proof cannot be correct, and sketch a new proof that (relatively) hyperbolic groups without two-torsion are strongly accessible. This is joint work with N. Touikan.

Other Information: 

Location: WMAX 216

 

For more information please visit UBC Math Department

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