Previous Conferences & Workshops

May
13
2025

Analysis and Mathematical Physics

From Bourgain's Projection Theorem to Kakeya and Khintchine on Fractals: An Impressionistic Picture
Pablo Shmerkin
2:30pm|Simonyi Hall 101 and Remote Access

Several recent groundbreaking results in geometric measure theory, homogeneous dynamics and number theory ultimately rely on a key result of Bourgain known as Bourgain's Projection Theorem (of course, each of these results require many other tools...

May
12
2025

Joint IAS/PU Arithmetic Geometry

Higher singularities in positive characteristic
3:35pm|Simonyi 101 and Remote Access

I will start by reviewing various Hodge-theoretic invariants of complex singularities. After that, I will discuss how to study such singularities using methods of positive characteristic such as Cartier operators. This is based on joint work with...

May
12
2025

Computer Science/Discrete Mathematics Seminar I

The Sample Complexity of Smooth Boosting and the Tightness of the Hardcore Theorem
Guy Blanc
10:30am|Simonyi Hall 101 and Remote Access

This talk will be about two related results, one in complexity theory and one in learning.

On the learning side, we investigate the sample complexity of smooth boosters - These are boosting algorithms that do not place too much weight on any given...

May
09
2025

Special Seminar

Multiple Polylogarithms, Algebraic K-Theory, and the Steinberg Module
Daniil Rudenko
2:00pm|Simonyi 101

Multiple polylogarithms appear to be central to many seemingly unrelated areas of mathematics, including the volumes of hyperbolic polytopes, scissors congruence, algebraic K-theory, and special values of zeta functions. Despite this broad network...

May
09
2025

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

Equivariant Floer Theory for Symplectic C*-manifolds
Alexander Ritter
9:15am|Remote Access

The talk will be on recent progress in a series of joint papers with Filip Živanović, about a large class of non-compact symplectic manifolds, which includes semiprojective toric manifolds, quiver varieties, and conical symplectic resolutions of...

May
08
2025

Joint PU/IAS Number Theory

Arithmetic Applications of Random Multiplicative Functions
Max Wenqiang Xu
4:30pm|Simonyi 101 and Remote Access

I will give an overview of recent progress in random multiplicative functions (random models for multiplicative functions) and their connection to the study of the Fyodorov-Hiary-Keating conjecture and Polya's question on nonnegative character sums...

May
08
2025

Special Year Seminar II

A Reduction of the F-Conjecture
Angela Gibney
10:00am|Simonyi 101

The long-standing F-Conjecture asserts that there is a very simple description for the closed cone of effective curves on the moduli space M_{g,n}\bar of stable n-pointed curves of genus g as being determined by a finite collection of so-called F...

May
07
2025

Connections to Schubert Calculus Learning Seminar

Enumerating Smooth-Like Permutations Via the Geometry of Schubert Varieties
Edward Richmond
3:30pm|Simonyi 101

In 1984, Ryan showed that any smooth Schubert variety in type A is an iterated fiber-bundle of Grassmannian varieties. Later, Haiman calculated the generating function for the number of smooth permutations (equivalently smooth Schubert varieties) of...

May
07
2025

Special Year Seminar I

Combinatorics in Quantum K-theory Schubert Calculus
Cristian Lenart
2:00pm|Simonyi 101

I will discuss various applications of a combinatorial model for the (torus equivariant) quantum K-theory of flag manifolds G/B, called the quantum alcove model. This is a uniform model for all Lie types, based on Weyl group combinatorics. It first...

May
06
2025

Joint IAS/PU Groups and Dynamics Seminar

Aspects of the large scale geometry of $\operatorname{Out}(F_n)$
Lee Mosher
4:30pm|Simonyi 101

The theory of hierarchically hyperbolic groups, due to Behrstock, Hagen, and Sisto, was developed by abstracting work of Masur and Minsky on mapping class groups. Study of the large scale geometry of the outer automorphism group $\operatorname{Out}...