Henry Helson meets other big shots — a brief survey
Henry Helson meets other big shots — a brief survey
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亨利·赫尔森会见其他大人物——一项简短的调查
DOI:
10.3318/pria.2019.119.08
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
I. Schoolmann
中科院分区:
文献类型:
--
作者:
A. Defant;I. Schoolmann
A theorem of Henry Helson shows that for every ordinary Dirichlet series $\sum a_n n^{-s}$ with a square summable sequence $(a_n)$ of coefficients, almost all vertical limits $\sum a_n \chi(n) n^{-s}$, where $\chi: \mathbb{N} \to \mathbb{T}$ is a completely multiplicative arithmetic function, converge on the right half-plane. We survey on recent improvements and extensions of this result within Hardy spaces of Dirichlet series -- relating it with some classical work of Bohr, Banach, Carleson-Hunt, Cesaro, Hardy-Littlewood, Hardy-Riesz, Menchoff-Rademacher, and Riemann.