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arXiv 1909.04874math.FA
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巴拿赫代数的近似半顺从性

Approximate semi-amenability of Banach algebras

M. Shams Kojanaghi, K. Haghnejad Azar, M. R. Mardanbeigi

摘要:

设$\mathfrak{A}$是Banach代数,$\mathcal{X}$是Banach $\mathfrak{A}$ -双模.一个有界线性映射$\mathcal{D}:\mathfrak{A}\rightarrow \mathcal{X}$是近似半内导的,如果在$\mathcal{X}$中存在网$(ξ_α)_α$和$(μ_α)_α$,使得对于每个$a\in\mathfrak{A}$,有$\mathcal{D}(a)=\lim_α(a.ξ_α-μ_α.a)$ .如果对每个Banach $\mathfrak{A}$ -双模$\mathcal{X}$,每个$\mathcal{D}\in\mathcal{Z}^{1}(\mathfrak{A},\mathcal{X}^{*})$是近似半内模,则称$\mathfrak{A}$是近似半顺从的。有一些巴拿赫代数是近似半顺从的,但不是近似顺从的。本文研究了巴拿赫代数的近似半顺从性的一些性质。在定理\ref{ee}中,我们证明了局部紧群$G$上的Segal代数的近似半顺从性.

英文摘要:

Let $\mathfrak{A}$ be a Banach algebra, and $\mathcal{X}$ a Banach $\mathfrak{A}$-bimodule. A bounded linear mapping $\mathcal{D}:\mathfrak{A}\rightarrow \mathcal{X}$ is approximately semi-inner derivation if there eixist nets $(ξ_α)_α$ and $(μ_α)_α$ in $\mathcal{X}$ such that, for each $a\in\mathfrak{A}$, $\mathcal{D}(a)=\lim_α(a.ξ_α-μ_α.a)$. $\mathfrak{A}$ is called approximately semi-amenable if for every Banach $\mathfrak{A}$-bimodule $\mathcal{X}$, every $\mathcal{D}\in\mathcal{Z}^{1}(\mathfrak{A},\mathcal{X}^{*})$ is approximtely semi-inner. There are some Banach algebras which are approximately semi-amenable, but not approximately amenable. In this manuscript, we investigate some properties of approximate semi-amenability of Banach algebras. Also in Theorem \ref{ee} we prove the approximate semi-amenability of Segal algebras on a locally compact group $G$.

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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