Derivations on the algebra of Rajchman measures

Derivations on the algebra of Rajchman measures
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Rajchman 测度代数的推导

DOI:
10.1007/s40627-019-0025-5
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发表时间:
2019
期刊:
Complex Analysis and its Synergies
影响因子:
--
通讯作者:
Ghandehari, Mahya
Ghandehari, Mahya
中科院分区:
--
文献类型:
--
作者:
Ghandehari, Mahya

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对于局部紧的Abel群G,Rajchman测度代数记为G上Fourier变换在无穷远处为零的所有有界正则Borel测度的集合.本文研究了Rajchman测度代数的谱结构,并举例说明了其极大理想空间的剩余解析结构。特别地,当G是非离散的局部紧阿贝尔群时,我们证明了它是一个非零连续的点导子。然后,我们给出了一般(不一定是Abel)局部紧群的Rajchman代数的定义,并证明了对于非紧连通SIN群,Rajchman代数允许一个非零连续点导子.此外,我们讨论了谱的解析行为。也就是说,我们证明了对于每个非离散的可度量化局部紧阿贝尔群G,的极大理想空间包含解析圆。
For a locally compact Abelian groupG, the algebra of Rajchman measures, denoted by, is the set of all bounded regular Borel measures onGFourier transform of which vanish at infinity. In this paper, we investigate the spectral structure of the algebra of Rajchman measures, and illustrate aspects of the residual analytic structure of its maximal ideal space. In particular, we show thathas a nonzero continuous point derivation, wheneverGis a nondiscrete locally compact Abelian group. We then give the definition of the Rajchman algebra for a general (not necessarily Abelian) locally compact group, and prove that for a noncompact connected SIN group, the Rajchman algebra admits a nonzero continuous point derivation. Moreover, we discuss the analytic behavior of the spectrum of. Namely, we show that for every nondiscrete metrizable locally compact Abelian groupG, the maximal ideal space ofcontains analytic disks.
DOI: 10.1016/j.jfa.2015.02.014
发表时间: 2014-05
影响因子: 1.7
作者:
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通讯作者: Yemon Choi;M. Ghandehari
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