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Characterization of k-smoothness of operators defined between infinite-dimensional spaces
Linear and Multilinear Algebra ( IF 1.1 ) Pub Date : 2020-11-09 , DOI: 10.1080/03081087.2020.1844130 Arpita Mal 1 , Subhrajit Dey 2 , Kallol Paul 1
中文翻译:
无限维空间之间定义的算子的 k-平滑度的表征
更新日期:2020-11-09
Linear and Multilinear Algebra ( IF 1.1 ) Pub Date : 2020-11-09 , DOI: 10.1080/03081087.2020.1844130 Arpita Mal 1 , Subhrajit Dey 2 , Kallol Paul 1
Affiliation
ABSTRACT
We characterize k-smoothness of bounded linear operators defined between infinite-dimensional Hilbert spaces. We study the problem in the setting of both finite and infinite-dimensional Banach spaces. We also characterize k-smoothness of operators on some particular spaces, namely where is a finite-dimensional Banach space and is a two-dimensional Banach space. As an application, we characterize extreme contractions on where is a two-dimensional polygonal Banach space.
中文翻译:
无限维空间之间定义的算子的 k-平滑度的表征
摘要
我们描述了无限维希尔伯特空间之间定义的有界线性算子的k平滑度。我们在有限维和无限维 Banach 空间的设置中研究了这个问题。我们还描述了一些特定空间上运算符的k -平滑性,即在哪里是一个有限维 Banach 空间,并且是二维 Banach 空间。作为一个应用程序,我们将极端收缩描述为在哪里是二维多边形 Banach 空间。