Previous Conferences & Workshops

Mar
24
2025

Joint IAS/PU Arithmetic Geometry

Moduli space with abelian motives
Victoria Hoskins
3:35pm|Simonyi 101 and Remote Access

I will explain how several different moduli spaces of bundles on a smooth projective curve have abelian motives. Our starting point is a formula for the motive of the stack of vector bundles on the curve in Voevodsky's category of motives with...

Mar
24
2025

Members' Colloquium

The Mathematical Legacy of Hel Braun
1:00pm|Simonyi 101 and Remote Access

Hel Braun (IAS member 1947-1948) was a mathematician who introduced approaches that continue to impact research today.  Braun's research contributions lie in three areas: classical number theory problems about integers, modular and automorphic forms...

Mar
24
2025

Computer Science/Discrete Mathematics Seminar I

Efficiency, Resilience, and Artificial Intelligence
Moshe Y. Vardi
10:30am|Simonyi Hall 101 and Remote Access

In both computer science and economics, efficiency is a cherished property. The field of algorithms is almost solely focused on their efficiency. The goal of AI research is to increase efficiency by reducing human labor.  In economics, the main...

Mar
21
2025

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

Parametrised Whitehead Torsion of Families of Nearby Lagrangians
Noah Porcelli
9:15am|Remote Access

The parametrised Whitehead torsion is an invariant of families of manifolds, and can be viewed as a map to an algebraic K-theory space. A strong version of the nearby Lagrangian conjecture says that when applied to families of closed exact...

Mar
20
2025

Joint PU/IAS Number Theory

Sparsity of Intersections With Group Subschemes in an Abelian Scheme
Tangli Ge
3:30pm|*Princeton University, Fine 214*

I will talk about a unification of two bounded height results around abelian varieties. One is due to Silverman from 1983, which states, for an abelian scheme A/C with no fixed part over a curve C, that the set of points on C where the generic...

Mar
20
2025

What is...?

What is... Tropical Enumerative Geometry?
1:00pm|Simonyi Classroom (S-114)

Tropical enumerative geometry is a branch of combinatorial algebraic geometry that aims to count algebraic objects (usually curves on some surface passing through a number of points) by turning them into combinatorial objects, called tropical curves...

Mar
20
2025

Special Year Seminar II

The Quasisymmetric Flag Variety
Hunter Spink
10:00am|Simonyi 101

Abstract: In this talk I will construct a “quasisymmetric flag variety”, a subvariety of the complete type A  flag variety built by adapting the BGG geometric construction of divided differences to the newly introduced “quasisymmetric divided...

Mar
19
2025

Mathematical Conversations

On Stable Commutator Length and its New Relatives
6:00pm|Simons Hall Dilworth Room

Stable commutator length (or scl) of group elements is a well-known, simple-to-define invariant, related to bounded cohomology and quasimorphisms. Yet its simple definition is a trap: many of the exciting developments around scl required "better"...

Mar
19
2025

Connections to Schubert Calculus Learning Seminar

Kraskiewicz-Pragacz Modules, Magyar’s Configuration Varieties, and Schubert’s Space of Triangles
3:30pm|Simonyi 101

I’ll describe a circle of ideas that links Schubert polynomials with representation theory, via some configuration spaces studied by Magyar (and which include Schubert’s famous space of complete triangles). Most of the geometric connections were...

Mar
19
2025

Special Year Seminar I

Quasisymmetric Divided Differences and Forest Polynomials
Vasu Tewari
2:00pm|Simonyi 101

Postnikov's divided symmetrization, introduced in the context of volume polynomials of permutahedra, possesses a host of remarkable ``positivity'' properties. These turn out to be best understood using a family of operators we call quasisymmetric...