Previous Conferences & Workshops

Oct
13
2025

Workshop on Special Cycles and Related Topics

p-Curvature and Non-Abelian Cohomology
Daniel Litt
12:00pm|Simonyi Lecture Hall

Abstract: The cohomology of a family of algebraic varieties carries a number of interrelated structures, of both Hodge-theoretic and arithmetic flavors. I’ll explain joint work with Josh Lam developing analogues of some of these structures and...

Oct
13
2025

Computer Science/Discrete Mathematics Seminar I

Adaptive Robustness of Hypergrid Johnson-Lindenstrauss
Andrej Bogdanov
11:00am|West Bldg. Lecture Hall

In 1984 W. B. Johnson and J. Lindenstrauss showed that a random projection of an arbitrary point set S into low-dimensional space is approximately distance-preserving, as long as S is of size at most exponential in the target dimension. The...

Oct
13
2025

Workshop on Special Cycles and Related Topics

Baily--Borel Compactifications of Period Images and the b-semiampleness Conjecture
10:45am|Simonyi Lecture Hall

Abstract: Building on previous work of Satake and Baily, Baily and Borel proved in 1966 that arithmetic locally symmetric varieties admit canonical projective compactifications whose graded rings of functions are given by automorphic forms. Such...

Oct
13
2025

Workshop on Special Cycles and Related Topics

9:00am|Simonyi Hall 101

Sponsored by Dr. John P. Hempel 

Organizer: Jacob Tsimerman

The goal of the workshop was to investigate recent progress on special cycles from various perspectives, and the connection between geometric and arithmetic methods. 

Speakers:
Yves Andre...

Oct
09
2025

Joint IAS/PU Number Theory

On Uniform Boundedness of Torsion Points for Abelian Varieties Over Function Fields
Jit Wu Yap
3:30pm|Simonyi 101 and Remote Access

Let K be the function field of a smooth projective curve B over the complex numbers and let g be a positive integer. The uniform boundedness conjecture predicts that there exists a constant N, depending only on g and K, such that for any g...

Oct
09
2025

Special Year Research Seminar

Extensions of Globally Valued Fields and Arithmetic Geometry
1:00pm|Simonyi 101

Globally valued fields form a generalisation of global fields that fits into the context of first order (continuous) logic. I will describe these structures, and outline how they are connected to various parts of arithmetic geometry: Arakelov...

Oct
08
2025

Mathematical Conversations

Open Books and Secret Agents
6:00pm|Birch Garden, Simons Hall

An open book is a topological concept aptly named by Elmar Winkelnkemper.

The binding of the book is a fibred knot (of any dimension), and open books and fibred knots are essentially synonymous. Currently the standard reference for the existence and...

Oct
08
2025

Special Year Learning Seminar

Intro to o-minimality and point-counting: Part I
2:00pm|Simonyi 101

I'll introduce o-minimality from a user's perspective assuming zero background. I'll talk about some of the main examples of o-minimal structures: as a user of o-minimality your first goal is to find out whether your favorite set lives in one of...

Oct
07
2025

Joint IAS/PU Groups and Dynamics Seminar

Ultrafilters in Arithmetic Dynamics
Jit Wu Yap
4:30pm|Simonyi 101

Given a one-parameter degenerating family of rational maps on the projective line, it is possible to construct a non-archimedean limit which captures how this family degenerates.  Recently, Luo used ultrafilters to construct limits for an arbitrary...

Oct
07
2025

Analysis and Mathematical Physics

Towards a Geometric Theory of Deep Learning
2:30pm|Simonyi Hall 101 and Remote Access

The mathematical core of deep learning is function approximation by neural networks trained on data using stochastic gradient descent. I will present a collection of sharp results on training dynamics for the deep linear network (DLN), a...