Events and Activities

Explore current and upcoming events and activities happening at the Institute for Advanced Study.

Mar
29
2024

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

Three 20 Minute Research Talks
Yao Xiao, Yoav Zimhony and Qi Feng
9:15am|Remote Access
  • Yao Xiao : Equivariant Lagrangian Floer Theory on Compact Toric Manifolds

    We introduce an equivariant Lagrangian Floer theory on compact symplectic toric manifolds. We define a spectral sequence to compute the equivariant Floer cohomology. We show...

Apr
01
2024

Computer Science/Discrete Mathematics Seminar I

Tight Cell-Probe Lower Bounds for Dynamic Succinct Dictionaries
Huacheng Yu
11:00am|Simonyi 101 and Remote Access

A dictionary data structure maintains a set of at most $n$ keys from the universe $[U]$ under key insertions and deletions, such that given a query $x\in[U]$, it returns if $x$ is in the set. Some variants also store values associated to the keys...

Apr
01
2024

Members' Colloquium

On a Theorem of Furstenberg
2:00pm|Simonyi 101 and Remote Access

A deep result of Furstenberg from 1967 states that if $\Gamma$ is a lattice in a semisimple Lie group $G$, then there exists a measure on $\Gamma$ with finite first moment such that the corresponding harmonic measure on the Furstenberg boundary of...

Apr
01
2024

Joint IAS/Princeton Arithmetic Geometry Seminar

On De Rham Flip-Flopping in Dual Towers
3:30pm|Simonyi Hall 101 and Remote Access

We will discuss de Rham and Hyodo-Kato flip-flopping for dual towers of rigid analytic spaces. The main tools are comparison theorems expressing the two cohomologies as pro-étale cohomologies of corresponding relative period sheaves that, by...

Apr
02
2024

Computer Science/Discrete Mathematics Seminar II

New Derandomized Agreement Testers
10:30am|Simonyi Hall 101 and Remote Access

Agreement testing (aka direct product testing), checks if consistent local information reveals global structure. Beyond its theoretical connections to probabilistic checkable proofs (PCPs), constructing agreement testers is a fundamental...

Apr
02
2024

Condensed Learning Seminar

Six Functors
Juan Esteban Rodriguez Camargo
2:30pm|Simonyi Hall 101

Define the category of solid quasi-coherent sheaves $\mathcal{D}_\blacksquare(X)$ on a rigid-analytic varity $X$. Show that this assignment comes with a natural $6$-functor formalism. Finally, prove the Grothendieck--Serre duality in the rigid...

Apr
03
2024

Special Year Seminar

The $v$-Picard Group of Stein Spaces
2:00pm|Simonyi 101 and Remote Access

In this talk, I will present a computation of the image of the Hodge-Tate logarithm map (defined by Heuer) in the case of smooth Stein varieties. When the variety is the affine space, Heuer has proved that this image is equal to the group of closed...

Apr
03
2024

Special Homogeneous Dynamics Seminar

Directional Statistics of Lattice Points and Escape of Mass for Embedded Horospheres
Jens Marklof
4:30pm|Simonyi Hall 101 and Remote Access

I will discuss escape of mass estimates for SL(d,ℝ)-horospheres embedded in the space of affine lattices, which depend on the Diophantine properties of the shortest affine lattice vector. These estimates can be used, in conjunction with Ratner's...