Events and Activities

Explore current and upcoming events and activities happening at the Institute for Advanced Study.

Nov
23
2020

Princeton University Galread [Galactic/Extragalactic Reading Group]

A dominant population of optically invisible massive galaxies in the early Universe
Discussion Leader: Sinclaire Manning
11:00am|Remote via Zoom

Each week, we hold a relatively informal seminar/discussion series with an emphasis on extra-galactic and large-scale structure astrophysics.

During Galread a leader/visitor presents a recent paper to the discussion group. The PDF of the paper is...

Nov
23
2020

Computer Science/Discrete Mathematics Seminar I

New isoperimetric inequalities for convex bodies
11:15am|Remote Access Only - see link below

What can we say on a convex body from seeing its projections? In the 80s, Lutwak introduced a collection of measurements that capture this question. He called them the affine quermassintegrals. They are affine invariant analogues of the classical...

Nov
23
2020

Princeton University Exoplanet Discussion Group

Constraining the Circumbinary Disk Tilt in the KH 15D system
Michael Poon
12:15pm|Virtual Meeting

KH 15D is a system which consists of a young, eccentric, eclipsing binary, and a circumbinary disk which obscures the binary as the disk precesses. We develop a self-consistent model that provides a reasonable fit to the photometric variability that...

Nov
23
2020

Members’ Seminar

Growth, isoperimetry and Liouville property for random walks on groups
2:00pm|Simonyi Hall 101 and Remote Access - see Zoom link below

In a joint work with Tianyi Zheng we show that the growth function of the first Grigorchuk group satisfies \[ \ln \ln v_n/\ln v_n = a, \] where $a = \log 2/\log x$, $x$ being a positive root of the polynomial $x^3-x^2-2x-4$. This is done by...

Nov
23
2020

Analysis Seminar

Boundary regularity and stability for spaces with Ricci curvature bounded below
4:30pm|Simonyi Hall 101 and Remote Access - see Zoom link below

An extension of Gromov compactness theorem ensures that any family of manifolds with convex boundaries, uniform bound on the dimension and uniform lower bound on the Ricci curvature is precompact in the Gromov-Hausdorff topology. In this talk, we...

Nov
24
2020

Computer Science/Discrete Mathematics Seminar II

Factorization through L2, Rounding and Duality Part 2
10:30am|Remote Access Only - see link below

Let X and Y be normed spaces. In functional analysis, a ``theorem on factorization through L2'' refers to the following type of statement: 

Every bounded linear operator A mapping X to Y (i.e. sup_x ||A(x)||_Y/||x||_X

Such factorization...