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- Title
H<sup>p</sup> →→ H<sup>p</sup> boundedness implies H<sup>p</sup> →→ L<sup>p</sup> boundedness.
- Authors
Han, Yongsheng; Li, Ji; Lu, Guozhen; Wang, Peiyong
- Abstract
In this paper, we explore a general method to derive Hp →→ Lp boundedness from Hp →→ Hp boundedness of linear operators, an idea originated in the work of Han and Lu in dealing with the multiparameter flag singular integrals ([[Discrete Littlewood-Paley-Stein theory and multi-parameter Hardy spaces associated with the flag singular integrals]]). These linear operators include many singular integral operators in one parameter and multiparameter settings. In this paper, we will illustrate further that this method will enable us to prove the Hp →→ Lp boundedness on product spaces of homogeneous type in the sense of Coifman and Weiss ([[Lecture Notes in Math. 242: 1971]]) where maximal function characterization of Hardy spaces is not available. Moreover, we also provide a particularly easy argument in those settings such as one parameter or multiparameter Hardy spaces and where the maximal function characterization exists. The key idea is to prove ||ƒƒ|| Lp ≤≤ C ||ƒƒ || Hp for ƒƒ ∈∈ Lq ∩∩ Hp (1 < q < ∞∞, 0 < p ≤≤ 1). It is surprising that this simple result even in this classical setting has been absent in the literature.
- Subjects
MATHEMATICAL analysis; HARDY spaces; LITTLEWOOD-Paley theory; HARMONIC analysis (Mathematics); SINGULAR integrals; CALDERON-Zygmund operator; MAXIMA &; minima; MATHEMATICAL inequalities
- Publication
Forum Mathematicum, 2011, Vol 23, Issue 4, p729
- ISSN
0933-7741
- Publication type
Article
- DOI
10.1515/FORM.2011.026