Strong approximation of fractional Sobolev maps

Pierre Bousquet, Augusto C. Ponce, Jean Van Schaftingen

Brezis and Mironescu have announced several years ago that for a compact manifold $N^n\subset {\mathbb{R}}^{\nu }$ and for real numbers $0<s<1$ and $1\le p<\infty$ the class $C^\i…