Journal of Mathematical Analysis and Applications ( IF 1.3 ) Pub Date : 2021-01-15 , DOI: 10.1016/j.jmaa.2021.124968 Eike Schulte
Inspired by an extension of Wiener's lemma on the relation of measures μ on the unit circle and their Fourier coefficients along subsequences of the natural numbers by Cuny, Eisner and Farkas [1], 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 and . As an application, we present an extension of a result of Goldstein [6] on the action of semigroups on Hilbert spaces.
中文翻译:
关于维纳局部密聚群的引理
受到维纳引理的扩展的启发,它关于单位圆上的度量μ及其傅里叶系数的关系 沿子序列 根据Cuny,Eisner和Farkas [1]的自然数,我们研究了通过一系列概率测度对Fourier系数加权时引理的有效性。通过对从这些度量序列得出的滤波器使用收敛,我们获得了相似的结果,现在还可以考虑除 和 。作为应用,我们提出了Goldstein [6]结果对半群在希尔伯特空间上的作用的扩展。