Skip to content
# Events for 09/18/2019 from all calendars

## Quantum Symmetries Seminar

## Student Working Seminar in Groups and Dynamics

## Groups and Dynamics Seminar

## Committee P Meeting

## Graduate Student Organization Seminar

**Time:** 11:00AM - 12:00PM

**Location:** BLOC 111

**Speaker:** Adam Deaton, Texas A&M University

**Title:** *Exercise 3*

**Time:** 1:00PM - 2:00PM

**Location:** BLOC 628

**Speaker:** Krzysztof Święcicki

**Title:** *3-Manifolds*

**Abstract:** In his celebrated work from 2003, Perelman finished the proof of Poincare conjecture in dimension 3. His result is in fact far stronger and implies Thurston's geometrization conjecture, which classifies possible geometric structures on 3 manifolds. I'll give an overview of the result and introduce all eight basic geometries and their connection to group theory. I won't assume any knowledge outside of basic topology, so any newcomers are welcome.

**Time:** 3:00PM - 4:00PM

**Location:** BLOC 220

**Speaker:** Misha Lyubich, Stonybrook

**Title:** *Quasisymmetries of Julia sets*

**Abstract:** We will describe the group of quasisymmetric self-homeomorphisms of some Julia sets J. The answer depends substantially on the Julia set in question. For instance, for a ``Sierpinski carpet" J, this group turns out to be finite, for the ``basilica" J it is an uncountably infinite group containing the circle Thompson group, while for an ``Apollonian gasket" J, it is countably infinite. Based on joint results with M. Bonk, R. Lodge, S. Merenkov, and S. Mukherjee.

**Time:** 4:00PM - 5:00PM

**Location:** BLOC 220

**Speaker:** Committee P Meeting, Texas A&M University

**Time:** 4:00PM - 5:00PM

**Location:** BLOC 628

**Speaker:** Petr Naryshkin

**Title:** *Concentration and entire solutions to $\Delta u - u + u^3 = 0$ with various symmetries*

**Abstract:** We introduce the notion of concentration and outline the proof of the Concentration theorem for the given variational problem. We use it to show the existence of families of entire solutions to the equation $\Delta u - u + u^3 = 0$ in $\mathbb{R}^2$ with various symmetries. We finish by extending our results to more general equations in arbitrary dimension.

.