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arXiv 2007.10245math.FA
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一类新的分式索伯列夫空间

On New Families of Fractional Sobolev Spaces

Xiaobing Feng, Mitchell Sutton

摘要:

本文给出了三类新的一维分式索伯列夫空间及其相应的理论。新的结构和理论是基于一个新发展的概念,弱分数阶导数,这是自然的推广,以及建立整数阶索伯列夫空间和理论。特别地,引入并分析了两类新的单侧分式索伯列夫空间,揭示了对另一类对称分式索伯列夫空间的进一步认识.在这些索伯列夫空间中建立了许多重要的定理/性质,如密度/逼近定理、扩张定理、单边迹定理、各种嵌入定理和Sobolev不等式.此外,还发现了与已有分数索伯列夫空间的一些关系.本文的结果为以后系统地发展分数阶变分理论和分数阶偏微分方程理论及其数值解奠定了坚实的理论基础。本文是对文献[7]第1、4、5节材料的简要介绍。

英文摘要:

This paper presents three new families of fractional Sobolev spaces and their accompanying theory in one-dimension. The new construction and theory are based on a newly developed notion of weak fractional derivatives, which are natural generalizations of the well-established integer order Sobolev spaces and theory. In particular, two new families of one-sided fractional Sobolev spaces are introduced and analyzed, they reveal more insights about another family of so-called symmetric fractional Sobolev spaces. Many key theorems/properties, such as density/approximation theorem, extension theorems, one-sided trace theorem, and various embedding theorems and Sobolev inequalities in those Sobolev spaces are established. Moreover, a few relationships with existing fractional Sobolev spaces are also discovered. The results of this paper lay down a solid theoretical foundation for systematically developing a fractional calculus of variations theory and a fractional PDE theory as well as their numerical solutions in subsequent works. This paper is a concise presentation of the materials of Sections 1, 4 and 5 of reference [7].

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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