Mathematical Sciences-Analysis and PDE Seminar-Silvia Ghinassi, (Stony Brook University) "Smooth Reifenberg theorems for sets and measures"

Thursday, March 28, 2019
12:00 pm to 1:00 pm


Floor/Room #: 

Talk Title: Smooth Reifenberg theorems for sets and measures

Speaker: Silvia Ghinassi, Stony Brook University

Abstract: We provide geometric sufficient conditions for one-sided Reifenberg flat sets of any integer dimension in Euclidean space to be parametrized by a Lipschitz map with Hölder derivatives. The conditions use a Jones type square function and all statements are quantitative in that the Hölder and Lipschitz constants of the parametrizations depend on such a function. We use these results to prove sufficient conditions for higher order rectifiability of sets and measures. Key tools for the proof come from Guy David and Tatiana Toro’s parametrization of Reifenberg flat sets (with holes) in the Hölder and Lipschitz categories.