Previous Conferences & Workshops

Jan
23
2026

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

Three 20 Minute Research Talks
Levin Maier, Elad Kosloff and Joel Schmitz
9:15am|Remote Access

Levin Maier (Heidelberg University) : From Geometric Hydrodynamics to Periodic Geodesics on Manifolds of Mappings

In this talk, we begin by recalling Arnold’s geometric formulation of hydrodynamics and then extend this framework to a broader class of...

Jan
20
2026

Joint IAS/PU Groups and Dynamics Seminar

Equidistribution of Expanding Horospheres in the Space of Translation Surfaces
4:30pm|Simonyi 101

A translation surface is a closed surface that is obtained by gluing edges of a polygon in parallel. The group GL_2(R) acts on the collection translation surfaces of a fixed genus g. For a fixed translation surface S and t>0, we obtain a probability...

Jan
20
2026

Analysis and Mathematical Physics

Equidistribution of Expanding Horospheres in the Space of Translation Surfaces
2:30pm|Simonyi Hall 101 and Remote Access

A translation surface is a closed surface that is obtained by gluing edges of a polygon in parallel. The group $GL_2(R)$ acts on the collection translation surfaces of a fixed genus g. For a fixed translation surface S and t>0, we obtain a...

Jan
20
2026

Computer Science/Discrete Mathematics Seminar II

Improving Algorithmic Efficiency Using Cryptography
Or Zamir
11:30am|Simonyi 101 and Remote Access

Cryptographic primitives have been used for various non-cryptographic objectives, such as eliminating or reducing randomness and interaction. We show how to use cryptography to improve the time complexity of solving computational problems...

Jan
20
2026

Computer Science/Discrete Mathematics Seminar II

All-Pairs Min-Cut vs. All-Pairs Shortest-Path
Amir Abboud
10:30am|Simonyi 101 and Remote Access

The All-Pairs Min-Cut problem (APMC) asks to compute the minimum cut (or equivalently, the maximum flow) between all pairs of nodes in a graph.1 The naive solution of making n^2 calls to a single-pair min-cut algorithm was surpassed in 1961 by a...

Jan
16
2026

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

On the Topological Invariance of Helicity
Oliver Edtmair
9:15am|Remote Access

Helicity is an invariant of divergence free vector fields on a three-manifold. One of its fundamental properties is invariance under volume preserving diffeomorphisms. Arnold, having derived an ergodic interpretation of helicity as an asymptotic...

Dec
19
2025

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

Invariant Distances on Legendrian Spaces
Pierre-Alexandre Arlove
9:15am|Remote Access

I will begin by motivating the study of invariant distances on spaces of Legendrians. I will then discuss two main results:
(a) the construction of a new unbounded invariant distance on the universal cover of many Legendrian isotopy classes ;
(b) the...

Dec
18
2025

Joint IAS/PU Number Theory

Euler Systems in the Twisted Friedberg-Jacquet Setting
Shilin Lai
3:30pm|Simonyi 101 and Remote Access

We construct the tame part of a split anticyclotomic Euler system in a setting where local multiplicity one does not hold. Instead of the traditional zeta integral approach, we prove the existence of the necessary test vectors using a new method...

Dec
17
2025

What is...?

What is String Topology?
12:45pm|Simonyi 101 and Remote Access

Given two families of loops on a closed smooth manifold, one can concatenate the loops at the intersections points of these families to obtain a new family of loops. This is the Chas–Sullivan product on the homology of the free loop space of a...

Dec
17
2025

Special Groups and Dynamics Seminar

Asymptotic dimension, Isoperimetric Problem, and Traveling Salesman Problem in Groups
10:30am|Simonyi 101 and Remote Access

In many groups, the optimal diameter for the solutions of the isoperimetric problem is asymptotically equivalent to the lower bound coming from their cardinality; in this situation one says that the Følner function is lossless with respect to the...