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arXiv 0903.0830math.OA
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von Neumann algebras上$(σ,τ)-$衍生物的性质

A Characterization of $(σ,τ)-$ derivations on von Neumann algebras

M. Eshaghi Gordji

摘要:

设$\mathcal A$是von Neumann代数,$\mathcal M$是Banach $\mathcal A-$模.证明了对于$\mathcal A$上的每个同态$σ, τ$,每个有界线性映射$f:\mathcal A\to \mathcal M$具有如下性质:对于$\mathcal A$中的每个投影$p$,$f(p^2)=σ(p)f(p)+f(p)τ(p)$是$(σ,τ)-$导子.另外,还证明了对所有具有$ab=S$的$a,b\in \mathcal A$满足$f(ab)= σ(a)f(b)+f(a)τ(b)$的有界线性映射$f:\mathcal A \to \mathcal M $是$(σ,τ)-$导子,如果$τ(S)$对固定的$S$是左可逆的.

英文摘要:

Let $\mathcal A$ be a von Neumann algebra and $\mathcal M$ be a Banach $\mathcal A-$module. It is shown that for every homomorphisms $σ, τ$ on $\mathcal A$, every bounded linear map $f:\mathcal A\to \mathcal M$ with property that $f(p^2)=σ(p)f(p)+f(p)τ(p)$ for every projection $p$ in $\mathcal A$ is a $(σ,τ)-$derivation. Also, it is shown that a bounded linear map $f:\mathcal A \to \mathcal M $ which satisfies $f(ab)= σ(a)f(b)+f(a)τ(b)$ for all $a,b\in \mathcal A$ with $ab=S$, is a $(σ,τ)-$ derivation if $τ(S)$ is left invertible for fixed $S$.

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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