Haj\lasz-Sobolev Imbedding and Extension

Yuan Zhou

The author establishes some geometric criteria for a Haj\lasz-Sobolev $\dot M^{s,\,p}_\ball$-extension (resp. $\dot M^{s,\,p}_\ball$-imbedding) domain of ${\mathbb{R}}^n$ with $n\ge…