Previous Conferences & Workshops

Mar
01
2022

Computer Science/Discrete Mathematics Seminar II

Non-Black-Box Derandomization
10:30am|Simonyi Hall 101 and Remote Access

This is the third and final talk in the joint series with Lijie Chen. The talk will NOT rely on the technical contents from the two previous talks.

I will present a joint work with Lijie, in which we revise the hardness vs randomness framework so...

Feb
28
2022

Joint IAS/Princeton University Symplectic Geometry Seminar

Symplectic geometry of surface group representations
4:00pm

If G is a Lie group whose adjoint representation preserves a nondegenerate symmetric bilinear form on its Lie algebra (e.g. a semisimple group) and F is the fundamental group of a closed oriented surface S, then the spaces of equivalence classes of...

Feb
28
2022

Members' Colloquium

A Gentle Approach to Crystalline Cohomology
2:00pm|Simonyi Hall 101 and Remote Access

Let X be a smooth affine algebraic variety over the field C of complex numbers (that is, a smooth submanifold of C^n which can be described as the solutions to a system of polynomial equations). Grothendieck showed that the de Rham cohomology of X...

Feb
28
2022

Computer Science/Discrete Mathematics Seminar I

Refuting Smoothed k-SAT Formulas and a Proof of Feige's Conjecture
11:15am|Simonyi 101 and Remote Access

I'll present a new algorithm to refute, that is, efficiently find certificates of unsatisfiability, for smoothed instances of k-SAT and other CSPs. Smoothed instances are produced by starting with a worst-case instance and flipping each literal in...

Feb
25
2022

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

Topological entropy of Hamiltonian diffeomorphisms: a persistence homology and Floer theory perspective
Erman Cineli
9:15am|Remote Access

In this talk I will introduce barcode entropy and discuss its connections to topological entropy. The barcode entropy is a Floer-theoretic invariant of a compactly supported Hamiltonian diffeomorphism, measuring, roughly speaking, the exponential...

Feb
23
2022

Mathematical Conversations

Lego in finite groups, Hurwitz spaces, and Markoff triples
6:00pm|Birch Garden, Simons Hall

Let G be a group, and let (g,h) be a pair in G x G. Consider the group of symmetries of G x G generated by the "moves" sending (g,h) to (g,gh), (g,g^{-1}h), (g,hg), (g,hg^{-1}), (gh,h),...etc. An old question from the 50's, motivated by the study of...

Feb
23
2022

Mathematical Physics Seminar

Log-Sobolev inequality for near critical Ising and continuum $\varphi^4$ measures
4:30pm|Simonyi Hall 101 and Remote Access

I will present results on Glauber dynamics of Ising models and continuum
$\varphi^4$ measures.

For ferromagnetic Ising models, we show that the log-Sobolev constant satisfies a simple bound expressed only in terms of the susceptibility of the model...