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Jan
21
2025

Computer Science/Discrete Mathematics Seminar II

Explicit Codes Approaching the Generalized Singleton Bound Using Expanders
Shashank Srivastava
10:30am|Simonyi 101 and Remote Access

Error correcting codes are objects designed to withstand errors that may arise during communication. Originally intended for practical use, codes have come to be established as one of the central objects of study in theoretical computer science, due...

Jan
21
2025

Analysis and Mathematical Physics

The 3D Kinetic Couette Flow Via The Boltzmann Equation In The Diffusive Limit
Robert Strain
2:30pm|Simonyi Hall 101 and Remote Access

This talk is about the study of the Boltzmann equation in the diffusive limit in a channel domain $\mathbb{T}^2\times (-1,1)$ nearby the 3D kinetic Couette flow.  We will begin the talk with a substantial introduction for non-experts.  Our result...

Jan
22
2025

Special Year Seminar I

Introduction to Equivariant Cohomology
William Graham
2:00pm|Simonyi 101

Equivariant cohomology was introduced in the 1960s by Borel, and has been studied by many mathematicians since that time.  The talks will be an introduction to some of this work.  We will focus on torus-equivariant cohomology (as well as Borel-Moore...

Jan
23
2025

Special Year Seminar II

Introduction to Equivariant Cohomology (continued)
William Graham
10:00am|Simonyi 101

Equivariant cohomology was introduced in the 1960s by Borel, and has been studied by many mathematicians since that time.  The talks will be an introduction to some of this work.  We will focus on torus-equivariant cohomology (as well as Borel-Moore...

Jan
24
2025

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

Regularity and Persistence in Non-Weinstein Liouville Geometry via Hyperbolic Dynamics
Surena Hozoori
9:15am|Remote Access

We explore the construction of non-Weinstein Liouville geometric objects based on Anosov 3-flows, introduced by Mitsumatsu, in the generalized framework of Liouville Interpolation Systems and non-singular partially hyperbolic flows. We discuss the...

Jan
27
2025

Computer Science/Discrete Mathematics Seminar I

On Approximability of Satisfiable Constraint Satisfaction Problems & Applications
Amey Bhangale
10:30am|Simonyi 101 and Remote Access

The satisfiability problem for Constraint Satisfaction Problems (CSPs) asks whether an instance of a CSP has a fully satisfying assignment, i.e., an assignment that satisfies all constraints. This problem is known to be in class P or is NP-complete...

Jan
27
2025

IAS CMP/QFT Group Meeting

A Non-Semisimple Categorical Symmetry
Matthew Yu
11:00am|Bloomberg Lecture Hall (IAS)

Abstract: I will explain how to realize a gapped Hamiltonian for a (1+1)d system on the lattice which has a categorical symmetry given by the modules of the 4-dimensional Taft algebra. This category is finite but not a fusion category, a fact that...