Previous Conferences & Workshops

Feb
06
2018

Locally Symmetric Spaces Seminar

Moment map for spherical varieties (after F. Knop)
10:00am

We will discuss Knop's paper "The asymptotic behavior of invariant collective motion" which analyzes the moment map for a spherical variety and relates it to a Weyl group.

Feb
05
2018

Joint IAS/Princeton University Symplectic Geometry Seminar

Immersed Lagrangians near SYZ singular fibres
4:00pm|Fine Hall 322, Princeton University

One of the key problem in mirror symmetry is that singular fibres in higher dimensional SYZ fibrations of sufficiently interesting spaces (e.g. the quintic 3-fold) have bad singularities. This makes it unreasonable to directly define their...

Feb
05
2018

Computer Science/Discrete Mathematics Seminar I

Locally Repairable Codes, Storage Capacity and Index Coding
Arya Mazumdar
11:00am|Simonyi Hall 101

An error-correcting code is called locally repairable if any coordinate of a codeword can be recovered by accessing only few other coordinates. For locally repairable codes over small alphabets (such as binary), the optimal trade-off between...

Feb
01
2018

Theoretical Machine Learning Seminar

Two approaches to (Deep) Learning with Differential Privacy
Kunal Talwar
12:15pm|White-Levy Room

Machine learning techniques based on neural networks are achieving remarkable results in a wide variety of domains. Often, the training of models requires large, representative datasets, which may be crowd-sourced and contain sensitive information...

Jan
31
2018

Mathematical Conversations

Randomness to Structure
6:00pm|Dilworth Room

We will describe several situations in number theory and geometry in which one recovers a sought-after structure by first constructing a “random” approximation to it.

Jan
31
2018

Analysis Seminar

Möbius disjointnes conjecture: uniform convergence and entropy
Mariusz Lemanczyk
3:30pm|S-101

A topological dynamical system $(X,T)$ is said to be Möbius disjointnes if \[\tag{$*$} \lim_{N\to\infty}\frac1N\sum_{n\leq N}f(T^nx)\mu(n)=0\] for all $f\in C(X)$ and $x\in X$ ($\mu$ stands for the classical Möbius function).Sarnak's conjecture from...

Jan
31
2018

Analysis Seminar

Concentration inequalities for linear cocycles and their applications to problems in dynamics and mathematical physics
2:00pm|S-101

Given a measure preserving dynamical system, a real-valued observable determines a random process (by composing the observable with the iterates of the transformation). An important topic in ergodic theory is the study of the statistical properties...

Jan
30
2018

Locally Symmetric Spaces Seminar

Modular symbols and arithmetic
1:45pm|S-101

In these lectures, we will explore what insight can be gained into the arithmetic of Galois representations in a given dimension through the geometry of a higher-dimensional locally symmetric space near a boundary component. The starting point for...

Jan
30
2018

Computer Science/Discrete Mathematics Seminar II

Explicit, Epsilon-Balanced Codes Close to the Gilbert-Varshamov Bound
Amnon Ta-Shma
10:30am|S-101

I will show an explicit construction of a binary error correcting code with relative distance $\frac{1-\epsilon}{2}$ and relative rate $\epsilon^{2+o(1)}$. This comes close to the Gilbert-Varshamov bound that shows such codes with rate $\epsilon^2$...