Abstract
Let (X, d,µ) be an RD-space with “dimension” n, namely, a space of homogeneous type in the sense of Coifman and Weiss satisfying a certain reverse doubling condition. Using the Calderón reproducing formula, the authors hereby establish boundedness for paraproduct operators from the product of Hardy spaces H p(X) × H q(X) to the Hardy space H r(X), where p, q, r ∈ (n/(n + 1),∞) satisfy 1/p + 1/q = 1/r. Certain endpoint estimates are also obtained. In view of the lack of the Fourier transform in this setting, the proofs are based on the derivation of appropriate kernel estimates.
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Grafakos, L., Liu, L. & Yang, D. Boundedness of paraproduct operators on RD-spaces. Sci. China Math. 53, 2097–2114 (2010). https://doi.org/10.1007/s11425-010-4042-3
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DOI: https://doi.org/10.1007/s11425-010-4042-3