Variations on a proof of a borderline Bourgain-Brezis Sobolev embedding   theorem
  We offer a variant of a proof of a borderline Bourgain-Brezis Sobolev embedding theorem on $\mathbb{R}^n$. We use this idea to extend the result to real hyperbolic spaces $\mathbb{H}^n$. 
Sagun Chanillo, Jean Van Schaftingen, Po-Lam Yung
math.CA math.AP