## PIMS Network Wide Colloquium: Assaf Naor

- Date: 09/23/2021
- Time: 13:30

Online

Isomorphic reverse isoperimetry and Lipschitz extension [video]

In the Lipschitz extension problem we are given a pair of metric spaces X,Y and ask for the smallest K such that for any subset A of X every L-Lipschitz mapping from A to Y can be extended to a KL-Lipschitz mapping from X to Y. Most of this talk will be devoted to an introductory overview of part of the large amount of knowledge that has accumulated on this question over the past century, and its multifaceted connections to various mathematical areas. We will also explain longstanding mysteries that remain open despite major efforts, and describe recent progress that relates the Lipschitz extension problem to the question of reversing the classical isoperimetric inequality.

**Speaker Biography: **

Prior to starting his current position in 2014 as Professor of Mathematics at Princeton University, Assaf Naor received his doctorate from the Hebrew University (advised by Joram Lindenstrauss), was a researcher at Microsoft Research, and a Professor at the Courant Institute. His work is devoted to analysis and metric geometry, as well as its interactions with other areas such as probability, combinatorics and computer science. Naor is the winner of the Salem, Nemmers and Ostrowski prizes amongst other awards.

**About the series**:

Starting in 2021, PIMS has inaugurated a high-level network-wide colloquium series. Distinguished speakers will give talks across the full PIMS network with one talk per month during the academic term. The 2021 - 2022 speaker series is part of the PIMS 25th Anniversary showcase.

**Time**:
All network wide colloquia take place at 1:30pm Pacific Time

This event took place via zoom, and a recording is available on mathtube.org.