Article ID Journal Published Year Pages File Type
4593006 Journal of Functional Analysis 2006 16 Pages PDF
Abstract

A quantitative version of the standard Sobolev inequality, with sharp constant, for functions u in W1,1(Rn) (or BV(Rn)) is established in terms of a distance of u from the manifold of all multiples of characteristic functions of balls. Inequalities involving non-Euclidean norms of the gradient are discussed as well.

Related Topics
Physical Sciences and Engineering Mathematics Algebra and Number Theory