Previous Conferences & Workshops

Oct
29
2015

Joint IAS/Princeton University Number Theory Seminar

From local class field theory to the curve and vice versa
4:30pm|S-101

I will speak about results contained in my article "$G$-torseurs en théorie de Hodge $p$-adique" linked to local class field theory. I will in particular explain the computation of the Brauer group of the curve and why its fundamental class is the...

Oct
28
2015

Mathematical Conversations

Volumes of hyperbolic link complements
6:00pm|Dilworth Room

Thurston realized that certain link complements admit a complete hyperbolic metric, which is a complete invariant of the manifold. We'll discuss the volumes of hyperbolic link complements and what is known about them and open questions.

Oct
27
2015

Geometric Structures on 3-manifolds

A new cubulation theorem for hyperbolic groups
Daniel Groves
4:00pm|S-101

We prove that if a hyperbolic group $G$ acts cocompactly on a CAT(0) cube complexes and the cell stabilizers are quasiconvex and virtually special, then $G$ is virtually special. This generalizes Agol's Theorem (the case when the action is proper)...

Oct
27
2015

Geometric Structures on 3-manifolds

CAT(0) cube complexes and virtually special groups
Daniel Groves
2:00pm|S-101

Sageev associated to a codimension 1 subgroup $H$ of a group $G$ a cube complex on which $G$ acts by isometries, and proved this cube complex is always CAT(0). Haglund and Wise developed a theory of special cube complexes, whose fundamental groups...

Oct
27
2015

Computer Science/Discrete Mathematics Seminar II

Algorithmic proof of the Lovasz Local Lemma via resampling oracles
10:30am|S-101

For a collection of events on a probability space with specified dependencies, the Lovasz Local Lemma ("LLL") gives a sufficient condition for the existence of a point avoiding all the events. Following Moser's discovery of an efficient algorithm...

Oct
26
2015

Members’ Seminar

Quantum Ergodicity for the uninitiated
2:00pm|S-101

A key result in spectral theory linking classical and quantum mechanics is the Quantum Ergodicity theorem, which states that in a system in which the classical is ergodic, almost all of the Laplace eigenfunctions become uniformly distributed in...

Oct
26
2015

Computer Science/Discrete Mathematics Seminar I

Random words, longest increasing subsequences, and quantum PCA
John Wright
11:15am|S-101

Suppose you have access to iid samples from an unknown probability distribution $p = (p_1, \ldots, p_d)$ on $[d]$, and you want to learn or test something about it. For example, if one wants to estimate $p$ itself, then the empirical distribution...

Oct
23
2015

Joint IAS/Princeton University Symplectic Geometry Seminar

Dehn twists exact sequences through Lagrangian cobordism
Weiwei Wu
2:00pm|S-101

In this talk we first introduce a new "singularity-free" approach to the proof of Seidel's long exact sequence, including the fixed-point version. This conveniently generalizes to Dehn twists along Lagrangian submanifolds which are rank one...