2025-04-28 Monday Sign in CN

Activities
 Convex sets can have interior hot spots
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Reporter:
Jaume de Dios Pont, Doctor, ETH Zurich
Inviter:
Wei Wang, Associate Professor
Subject:
 Convex sets can have interior hot spots
Time and place:
9:30-10:30 April 25(Friday), N109
Abstract:

A homogeneous, insulated object with a non-uniform initial temperature will eventually reach thermal equilibrium. The Hot Spots conjecture addresses which point in the object takes the longest to reach this equilibrium: Where is the maximum temperature attained as time progresses? Rauch initially conjectured that points attaining the maximum temperature would approach the boundary. Burdzy and Werner disproved the conjecture for planar domains with holes. Kawohl, and later Bañuelos-Burdzy, conjectured that this should still hold for convex sets in all dimensions.

This talk will draw inspiration from a recurrent theme in convex analysis: almost every dimension-free result in convex analysis has a natural log-concave extension. We will motivate and construct the log-concave analog of the Hot Spots conjecture, and then disprove it. Using this log-concave construction, we will explain why the hot spots conjecture for convex sets is false in high dimensions.


Bio: Jaume de Dios Pont  is a Postdoctoral Researcher at ETH Zurich, working with Svitlana Mayboroda as part of the Simons Collaboration on Localization of Waves. Prior to this, he earned his PhD from UCLA in 2023 under the supervision of Terence Tao. His research broadly focuses on harmonic analysis, spectral theory, wave localization, and related areas.