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arXiv 1607.01741math.FA
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关于索伯列夫空间上限制算子性质的注记

A note on properties of the restriction operator on Sobolev spaces

David P. Hewett, Andrea Moiola

摘要:

在我们的配套文件(S. N。Chandler Wilde,D.P. Hewett,A. Moiola,索伯列夫空间on non-Lipschitz subsets of $\mathbb{R}^n$ with application to boundary积分方程on fractal screens,2016)我们研究了$\mathbb{R}^n$的一般(非Lipschitz)开子集$Ω$上的许多不同的索伯列夫空间,定义为$s\in\mathbb{R}$的经典贝塞尔势空间$H^s(\mathbb{R}^n)$的闭子空间。这些空间由限制算子映射到$Ω$上的某些分布空间。在本文中,我们对这些空间的整体和局部分布之间的关系进行了一些观察。特别是,我们研究的条件下,限制运营商是或不是内射,满射和等距给定的空间对之间。我们还提供了一个显式公式的最小范数扩张(逆的限制算子在适当的空间)在特殊情况下。

英文摘要:

In our companion paper (S.N. Chandler Wilde, D.P. Hewett, A. Moiola, Sobolev spaces on non-Lipschitz subsets of $\mathbb{R}^n$ with application to boundary integral equations on fractal screens, 2016) we studied a number of different Sobolev spaces on a general (non-Lipschitz) open subset $Ω$ of $\mathbb{R}^n$, defined as closed subspaces of the classical Bessel potential spaces $H^s(\mathbb{R}^n)$ for $s\in\mathbb{R}$. These spaces are mapped by the restriction operator to certain spaces of distributions on $Ω$. In this note we make some observations about the relation between these spaces of global and local distributions. In particular, we study conditions under which the restriction operator is or is not injective, surjective and isometric between given pairs of spaces. We also provide an explicit formula for minimal norm extension (an inverse of the restriction operator in appropriate spaces) in a special case.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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