Bourgain-Brezis-Mironescu formula for -spaces in arbitrary domains
arXiv:2308.12830 · doi:10.1007/s00526-023-02637-w
Abstract
Under certain restrictions on , the Triebel-Lizorkin spaces can be viewed as generalised fractional Sobolev spaces . In this article, we show that the Bourgain-Brezis-Mironescu formula holds for -seminorms in arbitrary domain. This addresses an open question raised by Brazke-Schikorra-Yung in [Bourgain-Brezis-Mironescu convergence via Triebel-Lizorkin spaces; Calc. Var. Partial Differential Equations; 2023].