Previous Conferences & Workshops

Oct
07
2025

Joint IAS/PU Symplectic Geometry Seminar

Hecke Algebras Via Morse Theory of Loop Spaces
Roman Krutowski
1:00pm|Simonyi 101 and Remote Access

Higher-dimensional Heegaard Floer homology (HDHF) is defined by extending Lipshitz's cylindrical reformulation of Heegaard Floer homology from surfaces to arbitrary Liouville domains. The HDHF also serves as a model for Lagrangian Floer homology of...

Oct
07
2025

Computer Science/Discrete Mathematics Seminar II

Algorithms for Solving Random and Semirandom Planted Constraint Satisfaction Problems
Peter Manohar
10:30am|Simonyi Hall 101 and Remote Access

In this talk, we will discuss new algorithms for solving instances of random and semirandom planted constraint satisfaction problems (CSPs). Random CSP are generated by first choosing a solution x and then sampling constraints so that x satisfies...

Oct
06
2025

Joint IAS/PU Arithmetic Geometry

Motivic Realization of Rigid Local Systems on Curves via Geometric Langlands
Joakim Faergeman
3:30pm|Simonyi 101 and Remote Access

A natural problem in the study of local systems on complex varieties is to characterize those that arise in a family of varieties. We refer to such local systems as motivic. Simpson conjectured that for a reductive group G, rigid G-local systems...

Oct
06
2025

Members' Colloquium

Billiards in Polygons
Jonathan Chaika
1:30pm|Simonyi 101 and Remote Access

Consider a point mass traveling in a polygon. It travels in a straight line, with constant speed, until it hits a side, at which point it obeys the rules of elastic collision. What can we say about this? When all the angles of the polygon are...

Oct
06
2025

Computer Science/Discrete Mathematics Seminar I

Stronger Cell Probe Lower Bounds via Local PRGs
Oliver Korten
11:00am|Simonyi Hall 101 and Remote Access

In this work, we develop a new method for proving lower bounds for static data structures in the classical cellprobe model of Yao. Our methods give the strongest known lower bounds for any explicit problem in this model (quadratically stronger for...

Oct
03
2025

Special Joint IAS/PU Symplectic Geometry Seminar

A Poincaré-Birkhoff theorem for $C^0$-Hamiltonian maps
Agustin Moreno
4:30pm|Simonyi Classroom (S-114)

In this talk, I will present a proof of a Poincaré--Birkhoff theorem for Hamiltonian maps on Liouville domains which are only continuous at the boundary. The motivation is finding periodic orbits in the circular, restricted three-body problem. Based...

Oct
02
2025

Joint PU/IAS Number Theory

The Intersection of Modular Correspondence
Baiqing Zhu
3:30pm|Fine 110, Princeton University

In this talk, I will present recent work on the intersection theory of modular correspondences. Specifically, we study the intersection numbers of modular correspondences of square-free level, focusing both on the nonsingular intersections and the...