A characterization of two weight norm inequality for Littlewood-Paley $g_{\lambda}^{*}$-function
Abstract
Let and be the well-known high dimensional Littlewood-Paley function which was defined and studied by E. M. Stein, \begin{align*} g_{\lambda}^{*}(f)(x) =\bigg(\iint_{\mathbb R^{n+1}_{+}} \Big(\frac{t}{t+|x-y|}\Big)^{n\lambda} |\nabla P_tf(y,t)|^2 \frac{dy dt}{t^{n-1}}\bigg)^{1/2}, \ \quad \lambda > 1, \end{align*} where , and , . In this paper, we give a characterization of two-weight norm inequality for -function. We show that, if and only if the two-weight Muchenhoupt condition holds, and a testing condition holds : \begin{align*} \sup_{Q : cubes \ in \mathbb R^n} \frac{1}{\sigma(Q)} \int_{\mathbb R^n} \iint_{\widehat{Q}} \Big(\frac{t}{t+|x-y|}\Big)^{n\lambda}|\nabla P_t(\mathbf{1}_Q \sigma)(y,t)|^2 \frac{w dx dt}{t^{n-1}} dy < \infty, \end{align*} where is the Carleson box over and is a pair of weights. We actually prove this characterization for -function associated with more general fractional Poisson kernel . Moreover, the corresponding results for intrinsic -function are also presented.
Keywords
Cite
@article{arxiv.1504.07850,
title = {A characterization of two weight norm inequality for Littlewood-Paley $g_{\lambda}^{*}$-function},
author = {Mingming Cao and Kangwei Li and Qingying Xue},
journal= {arXiv preprint arXiv:1504.07850},
year = {2018}
}
Comments
21 pages, to appear in Journal of Geometric Analysis