Sobolev inequalities in arbitrary domains

Thursday, April 23, 2015 - 14:00 to 14:50
Thack 704
Speaker Information
Andrea Cianchi
Universita degli Studi di Firenze

Abstract or Additional Information

 A theory of Sobolev inequalities in arbitrary open sets in $R^n$ is offered. Boundary regularity of domains is replaced with information on boundary traces of trial functions and of their derivatives up to some explicit minimal order. The relevant Sobolev inequalities involve constants independent of the geometry of the domain, and exhibit the same critical exponents as in the classical inequalities on regular domains. Our approach relies upon new representation formulas for Sobolev functions, and on ensuing pointwise estimates which hold in any open set. This is a joint work with V. Maz'ya.

Research Area