Geometric Topology Fair 2017

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Abstracts

Boundary amenability for Out(F_n)
Mladen Bestvina (University of Utah)

Abstract: The motivation for the talk is the recent result, joint with Vincent Guirardel and Camille Horbez, that Out(F_n) admits a topologically amenable action on a Cantor set. This implies the Novikov conjecture for Out(F_n) and its subgroups. Most of the talk will be an introduction to boundary amenability and ways to prove it for simpler groups.

TBA
Seonhee Lim (Seoul National University)

Abstract: TBA.

TBA
Hidetoshi Masai (Tohoku University)

Abstract:TBA

TBA
Kenichi Ohshika (Osaka University)

Abstract:TBA

TBA
Takuya Sakasai (University of Tokyo)

Abstract:TBA

TBA
Hyunsik Shin (KAIST)

Abstract:TBA

TBA
Balazs Strenner (Georgia tech)

Abstract:TBA

Constructions of hyperbolic surfaces with long systoles.
Bram Petri (University of Bonn)

Abstract: The length of the shortest non-contractible curve - the systole - of a closed hyperbolic surface is at most logarithmic in the genus of the surface. In this talk I will speak about constructions of hyperbolic surfaces with systoles of logarithmic length and discuss their properties. Part of this is joint work with Alex Walker.