Sharp Brezis--Seeger--Van Schaftingen--Yung Formulae for Higher-Order Gradients in Ball Banach Function Spaces

Pingxu Hu, Yinqin Li, Dachun Yang +2

Let $X$ be a ball Banach function space on ${\mathbb{R}}^n$, $k\in \mathbb{N}$, $h\in {\mathbb{R}}^n$, and ${\Delta }_h^k$ denote the $k${\rm th} order difference. In this article, under some mi…