Previous Conferences & Workshops

Apr
02
2019

Variational Methods in Geometry Seminar

Stable hypersurfaces with prescribed mean curvature
1:00pm|Simonyi Hall 101

In recent works with N. Wickramasekera we develop a regularity and compactness theory for stable hypersurfaces (technically, integral varifolds) whose generalized mean curvature is prescribed by a (smooth enough) function on the ambient Riemannian...

Apr
02
2019

Computer Science/Discrete Mathematics Seminar II

A high-dimensional Littlewood--Offord inequality
Li-Yang Tan
10:30am|Simonyi Hall 101

We prove a new Littlewood--Offord-type anticoncentration inequality for m-facet polytopes, a high-dimensional generalization of the classic Littlewood--Offord theorem. Joint work with Ryan O'Donnell and Rocco Servedio.

Apr
01
2019

Joint IAS/Princeton University Algebraic Geometry Seminar

Motivic Euler products and motivic height zeta functions
Margaret Bilu
5:00pm|Princeton University, Fine Hall 314

The Grothendieck group of varieties over a field k is the quotient of the free abelian group of isomorphism classes of varieties over k by the so-called cut-and-paste relations. It moreover has a ring structure coming from the product of varieties...

Apr
01
2019

Symplectic Dynamics/Geometry Seminar

The Arnold conjecture via Symplectic Field Theory polyfolds
Ben Filippenko
3:30pm|Simonyi Hall 101

I will explain a polyfold proof, joint with Katrin Wehrheim, of the Arnold conjecture: the number of 1-periodic orbits of a nondegenerate 1-periodic Hamiltonian on a closed symplectic manifold is at least the sum of the Betti numbers. Our proof is a...

Apr
01
2019

Members’ Seminar

A recent perspective on invariant theory
2:00pm|Simonyi Hall 101

Invariant theory is a fundamental subject in mathematics, and is potentially applicable whenever there is symmetry at hand (group actions). In recent years, new problems and conjectures inspired by complexity have come to light. In this talk, I will...

Apr
01
2019

Computer Science/Discrete Mathematics Seminar I

Fooling polytopes
Li-Yang Tan
11:00am|Simonyi Hall 101

We give a pseudorandom generator that fools $m$-facet polytopes over $\{0,1\}^n$ with seed length $\mathrm{polylog}(m) \cdot \mathrm{log}(n)$. The previous best seed length had superlinear dependence on $m$. An immediate consequence is a...

Mar
28
2019

Joint IAS/Princeton University Number Theory Seminar

Stronger Arithmetic Equivalence
Andrew Sutherland
4:30pm|Princeton University, Fine Hall 214

Number fields with the same Dedekind zeta function are said to be arithmetically equivalent. Such number fields necessarily have the same degree, discriminant, signature, Galois closure, and isomorphic unit groups, but may have different regulators...

Mar
28
2019

Working Seminar on Algebraic Number Theory

Hida theory and Ohta's canonical comparison map
Giada Grossi
2:15pm|Princeton University, Fine 1201

From Romyar's AWS notes:

  • Sections 4.1 and 4.2.

Regarding the proof of Ohta's comparison isomorphism:

  • Discuss Fukaya-Kato Section 1.7, which explains some p-adic Hodge theory background.
  • Discuss some elements of Ohta's proof, from Sections 3...