Previous Conferences & Workshops

Mar
20
2026

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

Legendrian Barriers
Emmanuel Opshtein
9:15am|Remote Access

In a previous work with Felix Schlenk, we showed that an analogue of the phenomenon of Lagrangian barriers holds in the contact framework in $S^3$ : there exist (explicit) Legendrian complexes of arcs in $S^3$ that have short Reeb chords to many...

Mar
19
2026

Joint PU/IAS Number Theory

The Large Sieve Inequality and Additive Decompositions of Sums of Squares
Julia Stadlmann
3:30pm|*Princeton University, Fine 214*

Ostmann’s problem asks if there are sets $A1$ and $A2$ with $|A1|, |A2| > 1$ so that the sumset $A1 + A2$ differs from the set of primes by only finitely many elements. It is believed that no such $A1$ and $A2$ exist, but to date the problem remains...

Mar
19
2026

Special Year Research Seminar

Tame Geometry in Quantum Field Theory and Gravity
Thomas Grimm
1:00pm|Simonyi 101

Ideas from tame geometry have recently begun to find their way into quantum field theory and string theory, suggesting that consistent effective theories and their observables may admit definable descriptions of finite complexity. In this talk I...

Mar
18
2026

Mathematical Conversations

A Radically Condensed History of Transcendental Number Theory
Dmitry Krachun
6:00pm|Simons Hall Dilworth Room

It is well-known that the constant e is transcendental, but many proofs of this fact seem opaque with some polynomial appearing to be pulled out of thin air. The goal of this talk is then to elucidate this proof, explain how the proof of $\pi$ being...

Mar
18
2026

Hermann Weyl Lectures

Learning from Complexity
Maryanthe Malliaris
2:00pm|Simonyi Hall 101 and Remote Access

Hilbert, motivating his list of 23 problems, mentions the arithmetical formulation of the concept of the continuum in the works of Cauchy, Bolzano and Cantor, and the discovery of non-Euclidean geometry by Gauss, Bolyai and Lobachevsky, as...

Mar
17
2026

Joint IAS/PU Groups and Dynamics Seminar

Random Dynamics on Surfaces
Homin Lee
4:30pm|314 Fine Hall

In this talk, we will discuss random dynamical systems and group actions on surfaces given by diffeomorphisms. We will mostly focus on the absolutely continuity of stationary measures, the classification of orbit closures, and the exact...

Mar
17
2026

Joint IAS/PU Symplectic Geometry Seminar

A Contact Flow Category
Soham Chanda
1:00pm|Fine Hall 401

We adapt the construction of global Kuranishi charts to the moduli space of genus 0 SFT buildings. Using these charts, we associate a flow category with any non-degenerate contact manifold where the objects are collections of Reeb orbits and...

Mar
17
2026

Computer Science/Discrete Mathematics Seminar II

Reverse Mathematics of Complexity Lower Bounds, Part II
10:30am|Simonyi 101 and Remote Access

Why is it so hard to prove P != NP, or even to prove super-linear circuit lower bounds? While we often blame a lack of combinatorial ingenuity, the bottleneck might be more fundamental: the logical strength of our mathematical tools.

This series of...

Mar
16
2026

Joint IAS/PU Arithmetic Geometry

Galois Orbit Bounds for Surface Degenerations
3:30pm|Princeton University, Fine Hall 224

Given a family $g: X \rightarrow S$ of smooth projective algebraic varieties over a number field $K$, one often wants to constrain the points $s$ in $S$ where the fibre $X_s$ acquires "extra" algebraic structure. A basic sort of constraint which is...

Mar
16
2026

Hermann Weyl Lectures

Learning from Complexity
Maryanthe Malliaris
2:00pm|Simonyi Hall 101 and Remote Access

Hilbert, motivating his list of 23 problems, mentions the arithmetical formulation of the concept of the continuum in the works of Cauchy, Bolzano and Cantor, and the discovery of non-Euclidean geometry by Gauss, Bolyai and Lobachevsky, as...