Special Year 2025-2026: Arithmetic Geometry, Hodge Theory, and O-minimality

Workshop on Special Cycles and Related Topics

October 14, 2025 | 2:30pm - 3:30pm

Abstract: I will discuss work in progress with M. Orr (Manchester) and G. Papas (Weizmann) on the Zilber-Pink conjecture for $Y(1)^3$. This is known for so-called asymmetric curves by the 2012 work of Habegger-Pila. More recently, an approach known...

Workshop on Special Cycles and Related Topics

October 14, 2025 | 10:45am - 11:45am

Abstract: We prove that an algebraic flat connection has $ {\mathbb R}_{\rm{ an, \  exp}}$-definable flat sections if and only if it is regular singular with unitary monodromy eigenvalues at infinity, refining previous work of Bakker–Mullane. This...

Workshop on Special Cycles and Related Topics

October 13, 2025 | 4:00pm - 5:00pm

Abstract: I’ll describe recent work for approaching certain functional transcendence problems through a combination of model theory and differential Galois theory. This is based on joint work with Blazquez-Sanz, Casale, and Nagloo.

Workshop on Special Cycles and Related Topics

October 13, 2025 | 2:30pm - 3:30pm

Abstract: Let $k$ be a field and $X$ a geometrically connected variety over $k$. The Tate or degeneracy locus of a $l$-adic local system on $X$ is the etale counterpart of the Hodge locus of a VHS. While in the last decade tremendous progresses have...

Workshop on Special Cycles and Related Topics

October 13, 2025 | 12:00pm - 1:00pm

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...

Workshop on Special Cycles and Related Topics

October 13, 2025 | 10:45am - 11:45am

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...

Workshop on Special Cycles and Related Topics

October 13, 2025 | 9:00am - October 17, 2025 | 1:00pm

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...

Special Year Research Seminar

October 09, 2025 | 1:00pm - 2:00pm

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...

Special Year Learning Seminar

October 08, 2025 | 2:00pm - 3:00pm

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...