# Events for 02/27/2024 from all calendars

## Number Theory Seminar

**Time: ** 09:45AM - 10:45AM

**Location: ** BLOC 302

**Speaker: **Sumit Kumar, Alfréd Rényi Institute of Mathematics

**Title: ***Hybrid level aspect subconvexity for L-functions*

**Abstract: **Level aspect subconvextiy problem has always been elusive in number theory. In this talk we discuss history of the problem and prove the level aspect subconvexity for degree six GL(3) × Gl(2) Rankin-Selberg L-functions,
when level of both the associated forms vary in some range. Joint work with
Munshi and Singh.

## Nonlinear Partial Differential Equations

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

**Location: ** BLOC 302

**Speaker: **Claude Bardos, Laboratoire J.-L.Lions

**Title: ***About large medium and shortime behavior of solutions of the collision of the Vlasov equation*

**Abstract: **TBA

## Nonlinear Partial Differential Equations

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

**Location: ** BLOC 302

**Speaker: **Matthias Hieber, Technische Universität Darmstadt

**Title: ***Analysis of Nematic Liquid Crystal Flows: The Ericksen-Leslie and the Q-Tensor Model *

**Abstract: **In this talk we consider two models describing the flow of nematic liquid crystals: the Ericksen-Leslie model and the Q-tensor model. We discuss local as well as global well-posedness results for strong solutions in the incompressible and compressible setting and investigate as well equlibrium sets and the longtime behaviour of solutions. This is joint work with A. Hussein, J. Pruss and M. Wrona.

## Topology Seminar

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

**Location: ** BLOC 624

**Speaker: **Maggie Miller, University of Texas at Austin

**Title: ***Branched covers of twist-roll spun knots*

**Abstract: **Twist-roll spun knots are a family of 2-spheres that are smoothly knotted in the 4-sphere. Many of these 2-spheres are known to be branch sets of cyclic covers of the 4-sphere over itself (maybe counterintuitively to 3-dimensional topologists, since this never happens for nontrivial knots in the 3-sphere). It’s very difficult to come up with interesting examples of 2-spheres in the 4-sphere, so this family typically serves as the examples in any theorem about surfaces in the 4-sphere. I’ll discuss a few different versions of their construction and prove a relationship between some of their branched coverings. As a corollary, we’ll conclude that some interesting families of manifolds known to be homeomorphic are actually diffeomorphic. This is joint with Mark Hughes and Seungwon Kim.