Colloquia and Seminars
Colloquium (Fridays, 3:00pm in ES-143)
To receive schedule updates by email, contact the Colloquium Chair, Prof. Marius Beceanu.
The colloquium usually meets on Friday at 3:00 pm in room ES-143.
The colloquium is partially supported from the Simons grant #584738 (Cristian Lenart)
- Rostislav Grigorchuk (Texas A&M University)
Joint-spectrum, self-similar groups and Schreier graphs
Friday, February 21, 2020
3:15 p.m. in ES-143
Abstract: We will explain how the idea of joint spectrum of a pencil of operators was used to study the spectral problem for graphs and groups. Self-similar groups will be defined and their role in mathematics will be outlined. A few results about joint spectra of operators associated with self-similar groups such as the "first" group of intermediate growth, the lamplighter group, and the Hanoi Towers groups on three pegs will be stated. Also it will be explained how renormalization is involved into the spectral problem.
- Avy Soffer (Rutgers)
- Rongwei Yang (University at Albany SUNY)
- Maheshwari Colloquium
Speaker: Wilhelm Schlag (Yale University)
Wilhelm Schlag is a Professor in the Department of Mathematics at Yale University. He obtained his PhD at the California Institute of Technology in 1996 under the supervision of Thomas Wolff. Since then, he has held positions at Princeton University, California Institute of Technology, and the University of Chicago, where he was H. J. Livingston Professor of Mathematics, before moving to Yale University in 2018. He has done extensive work in Fourier Analysis, spectral theory and dispersive partial differential equations. His research has earned him numerous awards including a Sloan fellowship in 2001, a Guggenheim fellowship in 2009, and a speaking invitation at the International Congress of Mathematicians in 2014.