Groups whose Fourier algebra and Rajchman algebra coincide

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS

卷:455

Article

Knudby, Soren¹ 

[1] WWU Munster, Math Inst, Einsteinstr 62, D-48149 Munster, Germany

关键词: Fourier algebra;    Rajchman algebra;    Locally compact groups;   

DOI  :  10.1016/j.jmaa.2017.06.042

来源: Elsevier

【 摘 要 】

We study locally compact groups for which the Fourier algebra coincides with the Rajchman algebra. In particular, we show that there exist uncountably many non compact groups with this property. Generalizing a result of Hewitt and Zuckerman, we show that no non-compact nilpotent group has this property, whereas non compact solvable groups with this property are known to exist. We provide several structural results on groups whose Fourier and Rajchman algebras coincide as well as new criteria for establishing this property. Finally, we study the relation between groups with completely reducible regular representation and groups whose Fourier and Rajchman algebras coincide. For unimodular groups with completely reducible regular representation, we show that the Fourier algebra may in general be strictly smaller than the Rajchman algebra. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

Free