MenuEvents for 11/07/2024 from all calendars
Number Theory Seminar
Time: 2:15PM - 3:15PM
Location: BLOC 302
Speaker: Robert Cass, University of Michigan
Title: Motives in the geometric Langlands program
Abstract: A result of Bezrukavnikov gives two categorical incarnations of the affine Hecke algebra, and can be viewed as a geometric Langlands correspondence in the tamely ramified case. I will discuss progress toward a motivic enhancement of this result, allowing for integral coefficients and eliminating the dependence on the choice of prime used in l-adic cohomology. In particular, I will explain motivic versions of the geometric Satake equivalence and Gaitsgory's central functor, which categorify the center of the affine Hecke algebra. This is joint work with T. van den Hove and J. Scholbach.
Mathematical Biology Seminar
Time: 3:00PM - 3:50PM
Location: BLOC 624
Speaker: Jay Brett, Johns Hopkins University
Title: Modeling Ocean Biology under Climate Change
Abstract: Mathematical modeling of ecosystems in the ocean allows for examination of the impacts of the changing physical environment on the populations of organisms. In this talk, two examples of interpreting the possible impacts of a warming climate will be considered. The first example is a quantification of the propagation of uncertainty from growth parameters in a phytoplankton model to uncertainty in the change of total growth under climate change. This shows that uncertainty driven by the biological model can be as large as that driven by the physical models. The second example is the development of a coral reef health model to understand how increased bleaching or preventative interventions will impact decadal-scale coral population dynamics. Coral reef loss is a climate tipping point, and the coupling of this model to other climate tipping systems will be discussed. https://bg.copernicus.org/articles/18/3123/2021/
Applied Math Seminar
Time: 3:00PM - 4:00PM
Location: BLOC 627
Speaker: Jay Brett, Johns Hopkins University
Title: Modeling Ocean Biology under Climate Change
Abstract: Mathematical modeling of ecosystems in the ocean allows for examination of the impacts of the changing physical environment on the populations of organisms. In this talk, two examples of interpreting the possible impacts of a warming climate will be considered. The first example is a quantification of the propagation of uncertainty from growth parameters in a phytoplankton model to uncertainty in the change of total growth under climate change. This shows that uncertainty driven by the biological model can be as large as that driven by the physical models. The second example is the development of a coral reef health model to understand how increased bleaching or preventative interventions will impact decadal-scale coral population dynamics. Coral reef loss is a climate tipping point, and the coupling of this model to other climate tipping systems will be discussed. https://bg.copernicus.org/articles/18/3123/2021/
Departmental Colloquia
Time: 4:00PM - 5:00PM
Location: BLOC 117
Speaker: Remi Abgrall, Institute of Mathematics, University of Zurich, Sw
Title: Do we still need numerical analysis and scientific computing?
Abstract: Nowadays, a great deal of effort and research is devoted to developing efficient methods for solving the problems described with partial differential equations. It is legitimate to ask whether we still need “old-fashioned” methods, and funding agencies often ask this question. In this talk, I'll give a personal viewpoint and a few examples that confirm that we still need “classical” viewpoints. However, these classic methods can certainly not be applied to everything. I'll also give some examples.
