# Events for October 11, 2017 from General and Seminar calendars

## Student Working Seminar in Groups and Dynamics

Time: 1:00PM - 2:00PM

Location: BLOC 628

Title: Shannon's Entropy II

Abstract: We will finish talking about basic properties of entropy and discuss concentration bounds, the equipartition property and if time permits, the Shannon's Fundamental Theorem for a Noiseless Channel.

## Noncommutative Geometry Seminar

Time: 2:00PM - 3:00PM

Location: BLOC 628

Speaker: Benben Liao, Texas A&M University

Title: Noncommutative maximal inequalities for group actions

Abstract: Let $G$ be a finitely generated group, and $M$ a semi-finite von Neumann algebra on which $G$ acts. When the group $G$ has polynomial growth, we obtain strong type $(p,p),p>1,$ and weak type $(1,1)$ maximal inequalities for $G$ acting on $M$. The result extends the work of Yeadon and Junge-Xu for $G$ being the integer group. This is based on joint work with Guixiang Hong and Simeng Wang (https://arxiv.org/abs/1705.04851).

## Groups and Dynamics Seminar

Time: 3:00PM - 4:00PM

Location: BLOC 220

Speaker: Rostislav Grigorchuk, Texas A&M

Title: On spectra of groups of intermediate growth

Abstract: I will explain how to compute the spectrum of the discrete Laplacian on a Cayley graph of the group of intermediate growth constructed by me in 1980 (joint result with A.Dudko). Also, the case of the so called overgroup of intermediate growth will be discussed. The arguments will be based on a combination of results from algebra, representation theory, graph theory and classical harmonic analysis. This talk is intended to be easy for the audience, and everything will be quite elementary. The talk could also be considered as a preparation for a second, more advanced future talk of the speaker at GD seminar.

## Postdoc Colloquium Series

Time: 4:00PM - 5:00PM

Location: Bloc 220

Speaker: Isaac Harris , TAMU

Title: Inverse scattering for materials with a conductive boundary

Abstract: In this talk, we will consider the inverse scattering problem for a material with a conductive boundary. We will see that the shape of the object can be uniquely determined by the scattering data. Next, we turn our attention to the associated transmission eigenvalue problem. The transmission eigenvalue problem corresponds to a differential operator that contains the material parameters and therefore hold information about the coefficients.

## AMUSE

Time: 6:00PM - 00:00AM

Location: BLOC 220

Speaker: Dr. Alireza Talebpour, Texas A&M University, Department of Civil Engineering

Title: Autonomous Vehicles: Challenges and Opportunities

Abstract: Driverless cars will appear on our roads and there is no question about that. The only question is "when?". To answer this question, we need to find a solution to several issues associated with this technology, including public acceptance and safety concerns. In this presentation, we will discuss the possible impacts of driverless cars on our lives, while a special focus will be made on the safety concerns.