By the inspirational works of Peter Sarnak and Ralph Phillips (ACTA 1985), we know that all classical Schottky groups (dim n >3) must have Hausdorff dimension strictly bounded away from dim n-1. Later Peter Doyle (ACTA 1988) showed that it is also true for n=3.

# Topology Seminar

Organizer(s):

For more information about this seminar, contact Zoltan Szabo, David Gabai, Sucharit Sarkar, Adam Levine, Peter Ozsvath or Lucas Culler

**Please click on seminar title for complete abstract.**

### Seminar Events

November 6, 2014

4:30pm - 5:30pm

##### All finitely generated Kleinian groups of small Hausdorff dimension are classical Schottky groups

Location

Fine Hall 314

Speaker: Yong Hou,

Zanty Electronics

Zanty Electronics

November 13, 2014

4:30pm - 5:30pm

##### 3-manifolds, Lipschitz geometry, and equisingularity

The local topology of isolated complex surface singularites is long understood, as cones on closed 3-manifolds obtained by negative definite plumbing.

Location

Fine Hall 314

Speaker: Walter Neumann ,

Columbia University

Columbia University

November 20, 2014

4:30pm - 5:30pm

##### TBA - Gordon

Location

Fine Hall 314

Speaker: Cameron Gordon,

University of Texas at Austin

University of Texas at Austin

December 4, 2014

4:30pm - 5:30pm

##### Heegaard Floer homologies and cuspidal curves

Location

Fine Hall 314

Speaker: Maciej Borodzik,

University of Warsaw

University of Warsaw

December 11, 2014

3:00pm - 4:00pm

##### TBA - NG

Location

Fine Hall 314

Speaker: Lenny Ng ,

Duke University

Duke University

April 30, 2015

4:30pm - 5:30pm

##### The total surgery obstruction

**This is a joint Topology - Algebraic Topology seminar.**

Location

Fine Hall 314

Speaker: Andrew Ranicki,

University of Edinburgh

University of Edinburgh