Previous Conferences & Workshops

Apr
10
2024

Mathematical Conversations

Can One Hear the Winding Number?
6:00pm|Birch Garden, Simons Hall

We discuss a modern perspective on the winding number on $S^1$ for maps that may not be continuous. This reveals a surprising connection to Fourier analysis and motivates the question: is the winding number determined by the moduli of the Fourier...

Apr
10
2024

Special Year Seminar

Rationalized Syntomic Cohomology
2:00pm|Simonyi 101 and Remote Access

A few years ago, Bhatt-Morrow-Scholze introduced an invariant of $p$-adic formal schemes called syntomic cohomology, which has a close relationship to (étale-localized) algebraic $K$-theory. In a recent paper, Antieau-Mathew-Morrow-Nikolaus showed...

Apr
09
2024

Computer Science/Discrete Mathematics Seminar II

The Method of Hypergraph Containers
Wojciech Samotij
10:30am|Simonyi Hall 101 and Remote Access

The method of hypergraph containers is a widely-applicable technique in probabilistic combinatorics. The method enables one to gain control over the independent sets of many `interesting' hypergraphs by exploiting the fact that these sets exhibit a...

Apr
08
2024

Joint IAS/Princeton Arithmetic Geometry Seminar

Recent Progress on Hodge Loci
Bruno Klingler
3:30pm|Fine 322, Princeton University

Given a quasi projective family S of complex algebraic varieties, its Hodge locus is the locus of points of S where the corresponding variety admits exceptional Hodge classes (conjecturally: exceptional algebraic cycles). In this talk, I will survey...

Apr
08
2024

Members' Colloquium

An Overview of Geometric Measure Theory, Area Minimising Currents, and Recent Progress
2:00pm|Simonyi 101 and Remote Access

Structures which minimise area appear in numerous geometric contexts often related to degeneration phenomena. In turn, in many situations these structures also reflect the ambient geometry in some way (they are ‘calibrated’) and so they may provide...

Apr
08
2024

Symplectic Geometry Seminar

Gromov-Witten Invariants and Complex Cobordism
Shaoyun Bai
12:30pm|Simonyi 101 and Remote Access

Since the beginning of the subject, it has been speculated that Gromov-Witten invariants should admit refinements in complex cobordism. I will propose a resolution of this question based on joint work-in-progress with Abouzaid, building on recent...

Apr
08
2024

Computer Science/Discrete Mathematics Seminar I

Polynomial Capacity and its Applications: To TSP and Beyond
Jonathan Leake
11:00am|Simonyi 101 and Remote Access

About 20 years ago, Gurvits developed the notion of polynomial capacity to give a simple proof of the famous van der Waerden lower bound on the permanent of a doubly stochastic matrix. Since then, similar techniques have led to various other...

Apr
05
2024

Special Number Theory Seminar

Expansion, Divisibility and Parity
Harald Helfgott
4:00pm|Simonyi 101 and Remote Access

We will discuss a graph that encodes the divisibility properties of integers by primes. We will prove that this graph has a strong local expander property almost everywhere. We then obtain several consequences in number theory, beyond the...

Apr
05
2024

Analysis and Mathematical Physics

Generic Properties of Laplace Eigenfunctions in the Presence of Symmetry
2:30pm|Simonyi Hall 101 and Remote Access

Let $G$ be a compact Lie group acting on a closed manifold $M$. Partially motivated by work of Uhlenbeck (1976), we explore the generic properties of Laplace eigenfunctions associated to $G$-invariant metrics on $M$. We find that, in the case where...