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Mathematics > Functional Analysis

arXiv:2210.01265 (math)
[Submitted on 3 Oct 2022 (v1), last revised 21 Oct 2023 (this version, v2)]

Title:Characterizations of product Hardy spaces on stratified groups by singular integrals and maximal functions

Authors:Michael G. Cowling, Zhijie Fan, Ji Li, Lixin Yan
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Abstract:A large part of the theory of Hardy spaces on products of Euclidean spaces has been extended to the setting of products of stratified Lie groups. This includes characterisation of Hardy spaces by square functions and by atomic decompositions, proof of the duality of Hardy spaces with BMO, and description of many interpolation spaces. Until now, however, two aspects of the classical theory have been conspicuously absent: the characterisation of Hardy spaces by singular integrals (of Christ--Geller type) or by (vertical or nontangential) maximal functions. In this paper we fill in these gaps by developing new techniques on products of stratified groups, using the ideas of Chen, Cowling, Lee, Li and Ottazzi on the Heisenberg group with flag structure.
Comments: Minor corrections and improvements made
Subjects: Functional Analysis (math.FA)
MSC classes: 42B30 (primary), 43A80, 46E30 (secondary)
Cite as: arXiv:2210.01265 [math.FA]
  (or arXiv:2210.01265v2 [math.FA] for this version)
  https://doi.org/10.48550/arXiv.2210.01265

Submission history

From: Michael Cowling [view email]
[v1] Mon, 3 Oct 2022 23:08:24 UTC (26 KB)
[v2] Sat, 21 Oct 2023 22:13:18 UTC (26 KB)
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