Previous Conferences & Workshops

Feb
06
2019

Mathematical Conversations

How to efficiently check proofs
Dor Minzer
6:00pm|Dilworth Room

The PCP Theorem states that any mathematical proof can be encoded in a way that allows verifying it probabilistically while reading only a small number of bits of the (new) proof. This result has several applications in Theoretical Computer Science...

Feb
05
2019

Variational Methods in Geometry Seminar

On the topology and index of minimal surfaces
3:30pm|Simonyi Hall 101

For an immersed minimal surface in $R^3$, we show that there exists a lower bound on its Morse index that depends on the genus and number of ends, counting multiplicity. This improves, in several ways, an estimate we previously obtained bounding the...

Feb
05
2019

Symplectic Dynamics Working Group

Quasiconformality and the Lyapunov spectrum
Clark Butler
1:30pm|Simonyi Hall Classroom 114

I will show that a closed, negatively curved Riemannian manifold of 1/4 pinched negative curvature has constant negative curvature if and only if the Lyapunov spectrum of its geodesic flow is the same as that of a hyperbolic manifold. The Lyapunov...

Feb
05
2019

Variational Methods in Geometry Seminar

Spacetime positive mass theorem
1:00pm|Simonyi Hall 101

It is fundamental to understand a manifold with positive scalar curvature and its topology. The minimal surface approach pioneered by R. Schoen and S.T. Yau have advanced our understanding of positively curved manifolds. A very important result is...

Feb
05
2019

Computer Science/Discrete Mathematics Seminar II

Non-commutative rank
Visu Makam
10:30am|Simonyi Hall 101

A linear matrix is a matrix whose entries are linear forms in some indeterminates $t_1,\dots, t_m$ with coefficients in some field $F$. The commutative rank of a linear matrix is obtained by interpreting it as a matrix with entries in the function...

Feb
04
2019

Joint IAS/Princeton University Algebraic Geometry Seminar

Drinfeld's lemma for schemes
5:00pm|Simonyi Hall 101

In the course of constructing the Langlands correspondence for GL(2) over a function field, Drinfeld discovered a surprising fact about the interaction between étale fundamental groups and products of schemes in characteristic p. We state this...

Feb
04
2019

Symplectic Dynamics/Geometry Seminar

A sheaf-theoretic SL(2, C) Floer homology for knots
Laurent Côté and Laurent Cote
3:30pm|Princeton University, Fine Hall 224

I'll outline the construction of an invariant for knots in homology 3-spheres which can be thought of as an SL(2,C) analog of Kronheimer and Mrowka's singular knot instanton homology. This invariant is similar to an invariant of 3-manifolds...

Feb
04
2019

Members’ Seminar

The Sample Complexity of Multi-Reference Alignment
2:00pm|Simonyi Hall 101

How should one estimate a signal, given only access to noisy versions of the signal corrupted by unknown cyclic shifts? This simple problem has surprisingly broad applications, in fields from aircraft radar imaging to structural biology with the...

Feb
04
2019

Computer Science/Discrete Mathematics Seminar I

Near-Optimal Strong Dispersers
Dean Doron
11:00am|Simonyi Hall 101

Randomness dispersers are an important tool in the theory of pseudorandomness, with numerous applications. In this talk, we will consider one-bit strong dispersers and show their connection to erasure list-decodable codes and Ramsey graphs.

The...