一对有界线性算子的广义欧氏算子半径不等式

Suvendu Jana
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引用次数: 0

摘要

让 $ \mathbb{B}(\mathscr{H})$ 表示 $C^*$-代数,它由 $\mathscr{H} 上的所有有界线性算子组成,并让 $N ( .) $ 是 $\mathbb{B}(\mathscr{H})$ 上的一个规范。我们定义一个在 $\mathbb{B}(\mathscr{H} $ 上的规范 $w_{(N,e)} (. , .)$ on $\mathbb{B}^2(\mathscr{H})$ by $$w_{(N,e)}(B. C)=\underset{B、C)=underset{|\lambda_1|^2+\lambda_2|^2\leq1}\supunderset{theta\in\mathbb{R}}\sup N\left(\Re\left(e^{i\theta}(\lambda_1B+\lambda_2C)\right)\right)、$$ for every$B,Cin\mathbb{B}(\mathscr{H})$ and $\lambda_1,\lambda_2\in\mathbb{C}.特别是,当 $N( .)$ 是希尔伯特-施密特规范时,我们证明了一对有界线性算子的一些希尔伯特-施密特欧几里得算子半径不等式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Generalized Euclidean operator radius inequalities of a pair of bounded linear operators
Let $ \mathbb{B}(\mathscr{H})$ represent the $C^*$-algebra, which consists of all bounded linear operators on $\mathscr{H},$ and let $N ( .) $ be a norm on $ \mathbb{B}(\mathscr{H})$. We define a norm $w_{(N,e)} (. , . )$ on $ \mathbb{B}^2(\mathscr{H})$ by $$ w_{(N,e)}(B,C)=\underset{|\lambda_1|^2+\lambda_2|^2\leq1}\sup \underset{\theta\in\mathbb{R}}\sup N\left(\Re \left(e^{i\theta}(\lambda_1B+\lambda_2C)\right)\right),$$ for every $B,C\in\mathbb{B}(\mathscr{H})$ and $\lambda_1,\lambda_2\in\mathbb{C}.$ We investigate basic properties of this norm and prove some bounds involving it. In particular, when $N( .)$ is the Hilbert-Schmidt norm, we prove some Hilbert-Schmidt Euclidean operator radius inequalities for a pair of bounded linear operators.
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