English

The existence of a bounded linear extension operator for $L^{s,p}(\mathbb{R}^n)$ when $\frac{n}{p}<\{s\}$

Classical Analysis and ODEs 2024-10-11 v1

Abstract

Let Ls,p(Rn)L^{s,p}(\mathbb{R}^n) denote the homogeneous Sobolev-Slobodeckij space. In this paper, we demonstrate the existence of a bounded linear extension operator from the jet space JEsLs,p(Rn)J^{\lfloor s \rfloor}_E L^{s,p}(\mathbb{R}^n) to Ls,p(Rn)L^{s,p}(\mathbb{R}^n) for any ERnE \subseteq \mathbb{R}^n, p[1,)p \in [1, \infty), and s(0,)s \in (0, \infty) satisfying np<{s}\frac{n}{p} < \{s\}, where {s}\{s\} represents the fractional part of ss. Our approach builds upon the classical Whitney extension operator and uses the method of exponentially decreasing paths.

Keywords

Cite

@article{arxiv.2410.07367,
  title  = {The existence of a bounded linear extension operator for $L^{s,p}(\mathbb{R}^n)$ when $\frac{n}{p}<\{s\}$},
  author = {Han Li},
  journal= {arXiv preprint arXiv:2410.07367},
  year   = {2024}
}