Previous Conferences & Workshops

Dec
13
2024

Bourgain Lecture

Additive Combinatorics and Pointwise Ergodic Theory
Sarah Peluse
2:00pm|Simonyi 101 and Remote Access

In 1975, Szemer\'edi proved that any subset of the natural numbers with positive upper density must contain arbitrarily long finite arithmetic progressions. Szemer\'edi's original argument was purely combinatorial, and then Furstenberg gave an...

Dec
13
2024

Computer Science/Discrete Mathematics Seminar II

Grid-norm Regularity for Somewhat Dense Graphs, and Some Applications
10:30am|Simonyi 101 and Remote Access

In 2023, Raghu Meka and I proved a substantially improved bound on the size of the smallest set of integers in [N] which contains no 3-term arithmetic progression. Since then, it has become clear that the main new ideas from that work are in fact...

Dec
13
2024

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

Using h-Cobordisms to Detect Non-Trivial Homotopy Groups in Spaces of Legendrian
Thomas Kragh
9:15am|Remote Access

In this talk I will first define the space of h-cobordisms associated to a manifold M. This space is known to have many non-trivial homotopy groups and in stable range (they can often be computed using Waldhausen's algebraic K-theory of spaces). I...

Dec
12
2024

Joint PU/IAS Number Theory

Inductive Methods for Counting Number Fields
Brandon Alberts
3:30pm|Simonyi 101 and Remote Access

We will discuss an inductive approach to determining the asymptotic number of G-extensions of a number field with bounded discriminant, and outline the proof of Malle's conjecture in numerous new cases. This talk will include discussions of several...

Dec
12
2024

Special Year Seminar II

Kahler Packages on Valuations on Convex Sets and Their Applications
Semyon Alesker
10:00am|Simonyi 101

A valuation is a finitely additive measure on the class of all convex compact subsets of $R^n$. Over the past two decades, a number of structures has been discovered on the space of translation invariant smooth valuations. Recently, these findings...

Dec
11
2024

Mathematical Conversations

Adding integers; when your fingers run out
6:00pm|Simons Hall Dilworth Room

In primary school, I never got beyond adding integers and the questions have only been piling up since! What do sets of integers $A$ look like if they generate only a few sums with the elements of another set $B$? Meester Jaap (my primary teacher)...

Dec
11
2024

Special Year Seminar I

Standard Monomials for Positroid Varieties
2:00pm|Simonyi 101

Influential work of Hodge from the 1940s led the way in using Gröbner bases to combinatorially study the Grassmannian. We follow Hodge's approach to investigate certain subvarieties of the Grassmannian, called positroid varieties. Positroid...

Dec
10
2024

Joint IAS/PU Groups and Dynamics Seminar

Corners with Polynomial Side Length
Noah Kravitz
4:30pm|Simonyi 101

 We prove ''reasonable'' quantitative bounds for sets in $\mathbb{Z}^2$ avoiding the ${polynomial}$ ${corner}$ ${configuration}$ $(x,y), (x+P(z),y), (x,y+P(z))$, where $P$ is any fixed integer-coefficient polynomial with an integer root of...

Dec
10
2024

Analysis and Mathematical Physics

Spectral Minimal Partitions: Local vs Global Minimality
2:30pm|Simonyi Hall 101 and Remote Access

In this overview talk we will explore a variational approach to the problem of Spectral Minimal Partitions (SMPs).  The problem is to partition a domain or a manifold into k subdomains so that the first Dirichlet eigenvalue on each subdomain is as...