Previous Conferences & Workshops

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...
Mar
27
2019

Mathematical Conversations

A curious family of curves
Amie Wilkinson
6:00pm|Dilworth Room

I will construct a family of curves in the square that illustrates the interplay between hyperbolic dynamics and pathology.

Mar
27
2019

Emerging Topics working group

Coherence and lattices
Matthew Stover
4:00pm|West Building Lecture Hall

Abstract: I will survey (in)coherence of lattices in semisimple Lie groups, with a view toward open problems and connections with the geometry of locally symmetric spaces. Particular focus will be placed on rank one lattices, where I will discuss...