Previous Conferences & Workshops

Feb
09
2021

SL2 Seminar

Tilting character computations
Geordie Williamson
3:00pm|Remote Access

Last week, Ben explained how diagrammatic algebra helps understand tilting characters. In Ben's talk the diagrammatic algebra was that of Temperley-Lieb flavour and its higher rank cousins (webs etc.) I will briefly recall the diagrammatics for the...

Feb
09
2021

Computer Science/Discrete Mathematics Seminar II

High dimensional expanders
Shai Evra
10:30am|Remote Access - see Zoom link below

Expander graphs are graphs which simultaneously are both sparse and highly connected. The theory of expander graphs received a lot of attention in the past half a century, from both computer science and mathematics. In recent years, a new theory of...

Feb
08
2021

Analysis Seminar

Planarity in Higher Codimension Mean Curvature Flow
Keaton Naff
4:30pm|Remote Access

We will discuss the mean curvature flow of $n$-dimensional submanifolds in $\mathbb{R}^{n+k}$ satisfying a pinching condition $|A|^2 c|H|^2$ introduced by Andrews and Baker (2010). For suitable constants $c$, these flows resemble flows of convex...

Feb
08
2021

Members’ Seminar

The top-heavy conjecture for vectors and matroids
Tom Braden
2:00pm|Simonyi Hall 101 and Remote Access

A 1948 theorem of de Bruijn and Erdős says that if $n$ points in a projective plane do not lie all on a line, then they determine at least n lines. More generally, Dowling and Wilson conjectured in 1974 that for any finite set of vectors spanning a...

Feb
08
2021

Computer Science/Discrete Mathematics Seminar I

Total Functions in the Polynomial Hierarchy
Robert Kleinberg
11:15am|Remote Access - see Zoom link below

Non-constructive existence proofs, which establish the existence of objects without furnishing an efficient algorithm to produce examples, abound in mathematics. How hard is it, computationally, to find objects whose existence is guaranteed non...

Feb
05
2021

Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Zoominar

Algebraic torus actions on Fukaya categories and tameness of change in Floer homology under symplectic isotopies
Yusuf Barış Kartal
9:15am|Remote Access

The purpose of this talk is to explore how Lagrangian Floer homology groups change under (non-Hamiltonian) symplectic isotopies on a (negatively) monotone symplectic manifold $(M,\omega)$ satisfying a strong non-degeneracy condition. More precisely...

Feb
04
2021

Quantum Groups Seminar

Center of quantum group
Arun Kannan
4:00pm|Remote Access

The talk covers Chapter 6 in Jantzen's book.