The Lp-Fourier Transform Norm on Compact Extensions of Locally Compact Groups
The Lp-Fourier Transform Norm on Compact Extensions of Locally Compact Groups
复制标题
局部紧群紧扩展的Lp-傅立叶变换范数
DOI:
10.1007/s00041-020-09739-5
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发表时间:
2020
影响因子:
1.2
通讯作者:
Junko Inoue
中科院分区:
文献类型:
--
作者:
Ali Baklouti;Junko Inoue
LetGbe a separable unimodular locally compact group of type I, and letNbe a unimodular closed normal subgroup ofGof type I, such thatG/Nis compact. Let for,anddenote the norms of the corresponding-Fourier transforms. We show that. In the particular case whereis defined by a semi-direct product of a separable unimodular locally compact groupNof type I and a compact subgroupKof the automorphism group ofN, we show that equality holds ifNhas aK-invariant sequenceof functions insuch thattends towhenjgoes to infinity. We show further that in some cases, an extremal function ofNextends to an extremal function ofG.