Events for 11/06/2020 from all calendars

Student Working Seminar in Groups and Dynamics

Time: 11:00AM - 12:00PM

Location: Zoom

Speaker: Konrad Wrobel

Title: Cofinite equivariance and wreath products

Abstract: We show all wreath products of cyclic groups with a given free group as the base space are orbit equivalent. In order to show this, we define the notion of a cofinitely equivariant and study how this property is preserved under free products. This is joint work with Robin Tucker-Drob.

Spectral Theory Reading Seminar

Time: 11:00AM - 11:50AM

Location: Zoom

Speaker: Rodrigo Matos, TAMU

Title: Shnol's Theorem

Mathematical Physics and Harmonic Analysis Seminar

Time: 1:50PM - 2:50PM

Location: Zoom

Speaker: Mengxuan Yang, Northwestern

Title: Wave Diffraction on Cones and The Aharonov-Bohm Effect

Abstract: Hormander's classic theorem shows the singularities of solutions to the wave equation propagate along the geodesic flow. This is generalized by Cheeger-Taylor and Melrose-Wunsch to manifolds with conic singularities, where the singularities propagate along the so-called diffractive geodesics. In this talk, we will discuss the finer structure of the diffractive wave on cones as well as propagation of singularities for the wave equation with a singular magnetic Laplacian. This latter equation, closely analogous to wave equations with conic singularities, is the setting of the celebrated Aharonov-Bohm effect.

Algebra and Combinatorics Seminar

Time: 3:00PM - 4:00PM

Location: Zoom

Speaker: Lauren Snider, Texas A&M

Title: On 2-dimensional parking functions

Abstract: A 2-dimensional U-parking function is a pair of integer sequences whose order statistics are bounded by certain weights along lattice paths in the plane. U-parking functions are natural higher-dimensional generalizations of classical parking functions. Other interesting generalizations include (p,q)-parking functions (Cori and Poulalhon) and graphical parking functions (Postnikov and Shapiro) . In this talk, we will show that (p,q)-parking functions are in fact U-parking functions for a particular node-set U, as well as explicitly describe the overlap between U-parking functions and graphical parking functions when U is affine. Along the way, we will discuss some results regarding the enumeration of increasing U-parking functions. This is based on joint work with Catherine Yan.

Open Teaching with Technology Forum

Time: 3:30PM - 5:00PM

Location: Zoom

Speaker: Vanessa Coffelt

Description: Join Zoom Meeting: https://tamu.zoom.us/j/93142718312?pwd=c2x5Zm5RZWdheEJ4SU40N3VYMlFpdz09 Meeting ID: 931 4271 8312

Student/Postdoc Working Geometry Seminar

Time: 10:00PM - 11:00PM

Location: zoom

Speaker: JM Landsberg, TAMU

Title: Mukai: moduli of rank 2 vector bundles on curves I