Previous Conferences & Workshops

Feb
25
2019

Members’ Seminar

Positive geometries
2:00pm|Simonyi Hall 101

Positive geometries are real semialgebraic sets inside complex varieties characterized by the existence of a meromorphic top-form called the canonical form. The defining property of positive geometries and their canonical forms is that the residue...

Feb
25
2019

Computer Science/Discrete Mathematics Seminar I

Strongly log concave polynomials, high dimensional simplicial complexes, and an FPRAS for counting Bases of Matroids
Shayan Oveis Gharan
11:00am|Simonyi Hall 101

A matroid is an abstract combinatorial object which generalizes the notions of spanning trees, and linearly independent sets of vectors. I will talk about an efficient algorithm based on the Markov Chain Monte Carlo technique to approximately count...

Feb
21
2019

Joint IAS/Princeton University Number Theory Seminar

Automorphy of mod 3 representations over CM fields
4:30pm|Princeton University, Fine 214

Wiles's proof of the modularity of semistable elliptic curves over the rationals uses the Langlands-Tunnell theorem as a starting point, implying that the mod 3 Galois representation attached to the elliptic curve arises from a modular form of...

Feb
21
2019

Working Seminar on Algebraic Number Theory

Class groups and Galois cohomology
Shilin Lai
2:15pm|Princeton University, Fine 1201

From Romyar's AWS notes:

  • Section 5.1, especially: Prop 5.1.5, Cor 5.1.9, Rem 5.1.10, Ex 5.1.11

From McCallum-Sharifi:

  • Explain why $\mathbb{Q}(37^{1/37})$ has class number prime-to-37 (this is Cor 7.6). It may simplify the proof to use Cor 5...
Feb
21
2019

Analysis Seminar

Plateau’s problem as a capillarity problem
1:00pm|Simonyi Hall 101

We introduce a length scale in Plateau’s problem by modeling soap films as liquid with small volume rather than as surfaces, and study the relaxed problem and its relation to minimal surfaces. This is based on joint works with Antonello Scardicchio...

Feb
20
2019

Mathematical Conversations

Finite fields and the Ax–Grothendieck theorem
6:00pm|Dilworth Room

The Ax–Grothendieck theorem from the 1960s says that an injective polynomial $f \colon \mathbb{C}^n \rightarrow \mathbb{C}^n$ is also surjective. It is one of the first examples of the powerful technique in algebraic geometry of using finite fields...