Previous Conferences & Workshops

Dec
01
2023

What is...?

What is an Incompressible Surface in a 3-Manifold?
1:00pm|Simonyi 101 and Remote Access

For a low-dimensional manifold, one often tries to understand its intrinsic topology and geometry through its submanifolds, in particular of co-dimension 1. To be interesting and to give some information, such a submanifold should interact with the...

Nov
30
2023

Joint PU/IAS Number Theory

Boundary Cohomology of Well-Positioned Subschemes of Integral Models of Shimura Varieties
Kai-Wen Lan
4:30pm|Institute for Advanced Study, Simonyi Hall, Room 101

I will first review what we know about the toroidal and minimal compactifications of Shimura varieties and their integral models, and the well-positioned subschemes of these integral models.  Then I will explain some p-adic analogues of Harris and...

Nov
29
2023

Special Year Seminar

On Cohomology of BG
2:00pm|Simonyi 101 and Remote Access

Cohomology of classifying space/stack of a group G is the home which resides all characteristic classes of G-bundles/torsors. In this talk, we will try to explain some results on Hodge/de Rham cohomology of BG where G is a $p$-power order...

Nov
28
2023

Computer Science/Discrete Mathematics Seminar II

Weighted Pseudorandom Generators via Inverse Analysis of Random Walks and Shortcutting
William Hoza
10:30am|Simonyi Hall 101 and Remote Access

A weighted pseudorandom generator (WPRG) is a generalization of a pseudorandom generator (PRG) in which, roughly speaking, probabilities are replaced with weights that are permitted to be positive or negative. In this talk, we present new explicit...

Nov
27
2023

Joint IAS/Princeton Arithmetic Geometry Seminar

Duality for 𝑝-adic Proétale Cohomology of Stein Spaces
4:30pm|Princeton University, Fine Hall 314

I will discuss duality theorems for p-adic proétale cohomology of rigid analytic Stein spaces, in both arithmetic and geometric cases. This is based on a joint work with Pierre Colmez and Wieslawa Niziol.

Nov
27
2023

Symplectic Geometry Seminar

On the Rigidity of Integrable Twist Maps of the 2d-Dimensional Annulus
Alfonso Sorrentino
12:30pm|Simonyi 101 and Remote Access

In the study of Hamiltonian systems, integrable dynamics play a crucial role. Integrability, however, appears to be a delicate property that is not expected to persist under generic small perturbations. Understanding the essence of this fragility...

Nov
27
2023

Computer Science/Discrete Mathematics Seminar I

Recent Progress on Derandomizing Space-Bounded Computation
William Hoza
11:15am|Simonyi 101 and Remote Access

Is randomness ever necessary for space-efficient computation? It is commonly conjectured that L = BPL, meaning that halting decision algorithms can always be derandomized without increasing their space complexity by more than a constant factor. In...