Previous Conferences & Workshops

Jan
26
2022

Arithmetic Groups

Grothendieck Pairs and Profinite Rigidity
Martin Bridson
11:00am|Simonyi 101 and Remote Access

If a monomorphism of abstract groups $H\hookrightarrow G$ induces an isomorphism of profinite completions, then $(G, H)$ is called a Grothendieck pair, recalling the fact that Grothendieck asked about the existence of such pairs with $G$ and $H$...

Jan
25
2022

Computer Science/Discrete Mathematics Seminar II

Bounds for subsets of $\mathbb{F}_p^n \times \mathbb{F}_p^n$ without L-shaped configurations
Sarah Peluse
10:30am|Simonyi 101 and Remote Access

I will discuss the difficult problem of proving reasonable bounds in the multidimensional generalization of Szemerédi's theorem.  Most of the first talk will be spent going over Shkredov's proof of good bounds for sets lacking corners, in...

Jan
24
2022

Joint IAS/Princeton University Symplectic Geometry Seminar

Symplectomorphisms mirror to birational transformations of the complex plane
Abigail Ward
4:00pm|Simonyi Hall 101 and Remote Access

We construct a non-finite type four-dimensional Liouville manifold $M$ and describe a correspondence between certain birational transformations of the complex plane preserving a standard holomorphic volume form and symplectomorphisms of $M$. This...

Jan
24
2022

Members' Colloquium

Cubic surfaces and non-Euclidean geometry
William Goldman
2:00pm|Simonyi Hall 101 and Remote Access

The classification of geometric structures on manifolds naturally leads to actions of automorphism groups, (such as mapping class groups of surfaces) on "character varieties" (spaces of equivalence classes of representations of surface groups).

Jus...

Jan
24
2022

Computer Science/Discrete Mathematics Seminar I

Reproducibility in Learning
Jessica Sorrell
11:15am|Simonyi 101 and Remote Access

Reproducibility is vital to ensuring scientific conclusions are reliable, but failures of reproducibility have been a major issue in nearly all scientific areas of study in recent decades. A key issue underlying the reproducibility crisis is the...

Jan
21
2022

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

Beyond semitoric
Susan Tolman
9:15am|Remote Access

A compact four dimensional completely integrable system $f: M \to R^2$ is semitoric if it has only non-degenerate singularities, without hyperbolic blocks, and one of the components of generates a circle action. Semitoric systems have been...