Previous Conferences & Workshops

Oct
23
2023

Symplectic Geometry Seminar

Coarse Distance from Dynamically Convex to Convex
Jean Gutt
12:30pm|Simonyi 101 and Remote Access

Chaidez and Edtmair have recently found the first examples of dynamically convex domains in $R^4$ that are not symplectomorphic to convex domains (called symplectically convex domains), answering a long-standing open question. In this talk we shall...

Oct
23
2023

Computer Science/Discrete Mathematics Seminar I

A Proof of the RM Code Capacity Conjecture
Emmanuel Abbé
11:15am|Simonyi 101 and Remote Access

In 1948, Shannon used a probabilistic argument to show the existence of codes achieving channel capacity. In 1954, Muller and Reed introduced a simple deterministic code construction, conjectured shortly after to achieve channel capacity. Major...

Oct
20
2023

Analysis and Mathematical Physics

Lipschitz Graphs in Carnot Groups
Davide Vittone
2:30pm|Simonyi Hall 101 and Remote Access

Submanifolds with intrinsic Lipschitz regularity in Carnot groups (i.e.,
stratified groups endowed with a sub-Riemannian structure) can be
introduced using the theory of intrinsic Lipschitz graphs started years
ago by B. Franchi, R. Serapioni and F...

Oct
20
2023

What is...?

What is a High Dimensional Expander?
Siqi Liu
1:00pm|Simonyi 101 and Remote Access
Oct
20
2023

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

Convex Hypersurfaces, Contact Homology, and Relative GW
Russell Avdek
9:15am|Remote Access

While convex hypersurfaces are well understood in 3d contact topology, we are just starting to explore their basic properties in high dimensions. I will describe how to compute contact homologies (CH) of their neighborhoods, which can be used to...

Oct
18
2023

Special Year Seminar

Test Ideals in Mixed Characteristic via the $p$-adic Riemann-Hilbert Correspondence
Linquan Ma
2:00pm|Simonyi 101 and Remote Access

Multiplier ideals in characteristic zero and test ideals in positive characteristic are fundamental objects in the study of commutative algebra and birational geometry in equal characteristic.  We introduced a mixed characteristic version of the...

Oct
17
2023

Computer Science/Discrete Mathematics Seminar II

Extending Generalization Theory to Address Phenomena in Contemporary Machine Learning
Shay Moran
10:30am|Simonyi Hall 101 and Remote Access

Recent years have seen remarkable progress in the field of Machine Learning (ML). 

However recent breakthroughs exhibit phenomena that remain unexplained and at times contradict conventional wisdom.  A primary reason for this discrepancy is that...

Oct
16
2023

Members' Colloquium

Fourier Uniqueness and Nonuniqueness Pairs
Mikhail Sodin
2:00pm|Simonyi 101 and Remote Access

Motivated by a discovery by Radchenko and Viazovska and by a work by Ramos and Sousa, we find conditions sufficient for a pair of discrete subsets of the real axis to be a uniqueness or a non-uniqueness pair for the Fourier transform. These...