Events for 04/25/2018 from all calendars
Noncommutative Geometry Seminar
Time: 2:00PM - 2:50PM
Location: BLOC 628
Speaker: Yanli Song, Washington University at St. Louis
Title: Orbital integral and K-theory
Abstract: In this talk, I will discuss the K-theory of group C*-algebra and Connes-Kasparov isomorphism for reductive Lie group. The main method we used is the orbital integral introduced by Harish-Chandra. I will try to explain some connections between the representation theory of Lie group and index of Dirac operators. This is a joint work with Higson and Tang.
Numerical Analysis Seminar
Time: 3:00PM - 4:00PM
Location: BLOC 628
Speaker: Jesse Chan, Rice University
Title: Discretely entropy stable high order methods for nonlinear conservation laws
Abstract: High order methods offer several advantages in the approximation of solutions of nonlinear conservation laws, such as improved accuracy and low numerical dispersion/dissipation. However, these methods also tend to suffer from instability in practice, requiring filtering, limiting, or artificial dissipation to prevent solution blow up. Provably stable finite difference methods based on summation-by-parts (SBP) operators and a concept known as flux differencing address this inherent instability by ensuring that the solution satisfies a semi-discrete entropy inequality. In this talk, we discuss how to construct discretely entropy stable high order discontinuous Galerkin methods by generalizing entropy stable finite difference schemes using discrete L2 projection matrices and “decoupled” SBP operators. Extensions to curvilinear meshes will be also discussed, and numerical experiments for the one and two-dimensional compressible Euler equations confirm the semi-discrete stability and high order accuracy of the resulting methods.
Groups and Dynamics Seminar
Time: 3:00PM - 4:00PM
Location: BLOC 220
Speaker: Guoliang Yu, Texas A&M
Title: A friendly introduction to the Baum-Connes conjecture (part 2)
Abstract: In this talk, I will give an introduction to the Baum-Connes conjecture and discuss its applications. I will explain how geometry of groups comes into the picture.
First Year Graduate Student Seminar
Time: 5:30PM - 6:30PM
Location: BLOC 628
Speaker: Peter Howard
Title: Summer 2018 and the years ahead