Previous Conferences & Workshops

Oct
20
2022

Joint IAS/PU Number Theory Seminar

On the kernel of the non abelian Fourier transform
Ngo Bao Chau
4:30pm|Simonyi Hall 101 and Remote Access

Tate reformulated the theory of the Riemann zeta function and its functional equation as the Mellin shadow of the Fourier transform on a certain space of function on the adeles. Conjecturally, Langlands' general automorphic L-functions and their...

Oct
20
2022

Guangbo Xu's Seminar

Derived orbifold chart lifts of flow categories and bimodules
1:00pm|West Lecture Hall and Remote Access

It is convenient to formalize the discussion about Hamiltonian Floer theory using the language of flow categories and bimodules. In this lecture I will explain how to use the notion of "derived orbifold chart lift" of flow categories and bimodules...

Oct
20
2022

Verlinde Dimension Formula

Verlinde Dimension Formula for the Space of Conformal Blocks and the moduli of G-bundles
10:15am|Simonyi 101 and Remote Access

Let G be a simply-connected complex semisimple algebraic group and let C be a smooth projective curve of any genus. Then, the moduli space of semistable G-bundles on C admits so called determinant line bundles. E. Verlinde conjectured a remarkable...

Oct
19
2022

Analysis and Mathematical Physics

On the Stability of the Fractional Caffarelli-Kohn-Nirenberg Inequality
4:30pm|Simonyi 101 and Remote Access

In this talk I will present a general framework to establish the stability of  inequalities of the form >= F(u); where L is a positive linear operator and F is a 2-homogeneous nonlinear functional.

We will then see how this framework can be...

Oct
19
2022

Special Year Learning Seminar

Fraisse Limits and Tensor Spaces
10:30am|Simonyi 101 and Remote Access

In model theory Fraisse limits are certain highly homogeneous countable structures -- examples include the rational numbers as the unique dense linear order without endpoints, and the Rado graph as the "unique infinite random graph".  I will discuss...

Oct
18
2022

Special Year Research Seminar

Word Width in Higher Rank Arithmetic Groups
4:00pm|Simonyi 101 and Remote Access

A word on d letters is an element of the free group of rank d, say, with basis x_1,…,x_d. Given a word w=w(x_1,…,x_d) on d letters, for every group G, there is a word map w:G^d—> G given by substituting the x_i’s with elements of G. We say that a...

Oct
18
2022

Special Year Research Seminar

Linear Equations in Smooth Numbers
Lilian Matthiesen
2:00pm|Simonyi 101 and Remote Access

A number is called y-smooth if all of its prime factors are bounded above by y. The set of y-smooth numbers below x forms a sparse subset of the integers below x as soon as x is sufficiently large in terms of y. If f_1, …, f_r \in Z[x_1,…,x_s] is a...

Oct
18
2022

Guangbo Xu's Seminar

AMS construction for Floer moduli spaces
1:00pm|West Lecture Hall and Remote Access

I will explain how to generalize Abouzaid-McLean-Smith's construction to Floer moduli spaces. As we need to regularize infinitely many moduli spaces, we need to make choices consistently. We also need to generalize the smoothing theory to the...

Oct
18
2022

Computer Science/Discrete Mathematics Seminar II

Almost Linear Time Algorithms for Max-flow and More
10:30am|Simonyi Hall 101 and Remote Access

We give the first almost-linear time algorithm for computing exact maximum flows and minimum-cost flows on directed graphs. By well known reductions, this implies almost-linear time algorithms for several problems including bipartite matching...

Oct
17
2022

Joint IAS/Princeton University Symplectic Geometry Seminar

Three-dimensional Anosov flows and non-Weinstein Liouville domains.
Thomas Massoni
4:00pm|Simonyi 101 and Remote Access

An Anosov flow $\Phi$ on a closed $3$-manifold $M$ gives rise to a non-Weinstein Liouville structure on $V:=[-1,1] \times M$. Building upon the work of Hozoori, we establish a homotopy correspondence between Anosov flows and certain pairs of contact...