Previous Conferences & Workshops

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...

Mar
18
2025

Joint IAS/PU Groups and Dynamics Seminar

Moments of Margulis Functions and Values of Ternary Quadratic Forms
Wooyeon Kim
4:30pm|Simonyi 101

The Oppenheim conjecture, proved by Margulis in 1986, states that for a non-degenerate indefinite irrational quadratic form Q in $n \geq$ 3 variables, the image set $Q(Z^n)$ of integral vectors is a dense subset of the real line. Determining the...

Mar
18
2025

Symplectic Geometry Seminar

Convex Hypersurfaces and Dynamical Systems
Julian Chaidez
1:00pm|Simonyi 101 and Remote Access

A hypersurface in a contact manifold is convex if there is a contact vector field that is transverse to it. Convex surfaces have long been a fundamental tool in 3-dimensional contact topology. In higher dimensions, convex hypersurfaces remained...