Monday, September 27, 2021
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All day |
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4:00pm |
09/27/2021 - 4:00pm We often seek to understand a group through the distribution of its orbits on a given space. In particular, the distribution of lattice orbits has been studied intensively in a variety of groups. In this talk we will discuss the distribution of orbits of geometrically finite groups acting on the light cone. We will see what can be said about the distribution, and how it relates to the distribution of the horospherical orbits in the frame bundle of certain infinite volume hyperbolic manifolds. This is a joint work with Jacqueline Warren. Location:
Zoom
09/27/2021 - 4:30pm Abstract: Non-topological twists of supersymmetric gauge theories have played an increasingly important role in mathematics in part due to relationships to vertex algebras and quantum groups. On the other hand, motivated by the higher genus B-model, twists of 10-dimensional theories of supergravity have also been introduced. In this talk, we give a complete description of the maximally non-topological twist of 11-dimensional supergravity, the low energy limit of M-theory. I will explain the unexpected result that the global symmetry algebra of the model is equivalent to an infinite-dimensional exceptional super Lie algebra known as E(5,10). I will also explain the relationship between other exceptional algebras and extended objects such as M2 and M5 branes in the twisted setting. Zoom link: https://yale.zoom.us/j/99305994163, contact the organizers (Gurbir Dhillon and Junliang Shen) for the passcode. Location:
Zoom
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