From November 19 to 23, 2012
Similar to the "warm-up" week, visitors and participants of the conference remaining at the CRM during this "cool-down" week will be welcomed to give informal presentations on their work. In addition, a mini-course has been planned that will delve further into some of the work presented during the conference.
Participants interested in
giving a talk, please contact Juan Gonzalez-Meneses (firstname.lastname@example.org) providing a title and a short
Camille Horbez, ENS
Title: The hyperbolicity of the sphere complex via surgery paths
Abstract : Handel and Mosher's proof of the hyperbolicity of the free splitting complex FSn for a free group Fn is a deep and much sought-after result, as it establishes FSn as a good possible analogue in the Out(Fn)-setting of the curve complex for surfaces. The goal of these lectures will be to present an alternative proof of Handel and Mosher's result, which uses a surgery procedure in Hatcher's sphere complex, a dual model for the free splitting complex. After recalling the definitions of these complexes and of surgery paths on spheres, I'll show how the hyperbolicity of FSn can be derived from topological arguments. This is joint work with A. Hilion.
(Université Catholique de Louvain)
degli Studi di Milano)
(Università di Bologna)