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arXiv 2005.05212math.FAmath.DSmath.GR
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关于局部紧阿贝尔群的Wiener引理

On Wiener's lemma for locally compact abelian groups

Eike Schulte

摘要:

受Cuny,Barnner和Farkas [CEF 19,arXiv:1701.00101]关于单位圆上测度$μ$与其沿自然数连续性$(k_n)$的Fourier系数$\widehatμ(k_n)$之间关系的Wiener引理的推广启发,我们研究了当傅里叶系数被一系列概率测度加权时该引理的有效性.通过使用相对于来自这些措施序列的过滤器的收敛性,我们得到了类似的结果,现在也允许考虑本地紧阿贝尔群以外的$\mathbb{T}$和$\mathbb{R}$。作为应用,我们推广了Goldstein [Gol96]关于半群在希尔伯特空间上作用的一个结果.

英文摘要:

Inspired by an extension of Wiener's lemma on the relation of measures $μ$ on the unit circle and their Fourier coefficients $\widehatμ(k_n)$ along subsequences $(k_n)$ of the natural numbers by Cuny, Eisner and Farkas [CEF19, arXiv:1701.00101], we study the validity of the lemma when the Fourier coefficients are weighted by a sequence of probability measures. By using convergence with respect to a filter derived from these measure sequences, we obtain similar results, now also allowing the consideration of locally compact abelian groups other than $\mathbb{T}$ and $\mathbb{R}$. As an application, we present an extension of a result of Goldstein [Gol96] on the action of semigroups on Hilbert spaces.

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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