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arXiv 0902.2358math.FA
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半拓扑半群上的一类远端函数

A Class of Distal Functions on Semitopological Semigroups

A. Jabbari, H. R. E. Vishki

摘要:

在\cite{S}中研究了由$({\mathbb {Z}}, +)$上的函数的集合$\{n\mapsto λ^{n^k}:$ $λ\in{\mathbb {T}}$和$k\in{\mathbb{N}}\}$生成的代数的范数闭包(称为Weyl代数).本文利用Namioka的一个结果,将该代数推广到一般的拓扑半群上,并证明了所涉及的代数的元素是distal的.特别是,我们研究这个代数的$({\mathbb {Z}}, +)$和(更一般地)的离散(添加剂)组的任何可数环。最后,我们的结果被处理的双循环半群。

英文摘要:

The norm closure of the algebra generated by the set $\{n\mapsto λ^{n^k}:$ $λ\in{\mathbb {T}}$ and $k\in{\mathbb{N}}\}$ of functions on $({\mathbb {Z}}, +)$ was studied in \cite{S} (and was named as the Weyl algebra). In this paper, by a fruitful result of Namioka, this algebra is generalized for a general semitopological semigroup and, among other things, it is shown that the elements of the involved algebra are distal. In particular, we examine this algebra for $({\mathbb {Z}}, +)$ and (more generally) for the discrete (additive) group of any countable ring. Finally, our results are treated for a bicyclic semigroup.

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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