In this paper, carrying on with our study of the Hardy-amalgam spaces $\mathcal H^{(q,p)}$ and $\mathcal{H}_{\mathrm{loc}}^{(q,p)}$ ($0<q,p<+\infty$), we give a characterization of their duals whenever $0<q\leq 1<p<+\infty$. Moreover, when $0<q\leq p\leq 1$, these characterizations coincide with those obtained in our earlier papers. Thus, we obtain a unified characterization of the dual spaces of Hardy-amalgam spaces, when $0<q\leq1$ and $0<q\leq p<+\infty$.
Real-Variable Characterizations of Orlicz-Slice Hardy Spaces
首先引入了一类Orlicz-片空间,它推广了P. Auscher等人最近研究的片空间,在此基础上,利用径向极大函数,引入了一类新的Hardy型空间--Orlicz-片Hardy空间.这种新的Orlicz切片Hardy空间包含A的Orlicz-Hardy空间的变体。Bonami和J. Feuto以及Z. V. de P. P. J. Feuto为特例。通过原子、分子、各种极大函数、Poisson积分和Littlewood-Paley函数得到了它们的特征。作为这些刻画的应用,作者建立了它们的有限原子刻画,从而进一步导出了它们的对偶空间的描述和从Orlicz切片Hardy空间到拟巴拿赫空间的次线性算子有界性的判别准则.然后,利用这一准则,得到了$δ$型Calderón-Zygmund算子在这些Orlicz片Hardy空间上的有界性.这些结果对于片Hardy空间都是新的,而且对于Hardy-amalgam空间,Littlewood-Paley函数的刻画、对偶空间以及$δ$型Calderón-Zygmund算子在这些Hardy型空间上的有界性也是新的.
Orthonormal Strichartz estimates for the Schrödinger equations with Hamiltonian on Wiener amalgam spaces
National Institute of Science Education and Research(国家科学教育研究中心);Homi Bhabha National Institute(霍米·巴巴国立研究所);Indian Statistical Institute Kolkata(印度统计学院加尔各答)
本文在 Wiener 调和空间上建立薛定谔方程的正交 Strichartz 估计,改进时间可积性指数并推广至正交族,应用于无穷粒子 Hartree 方程的适定性。
Hardy Spaces Associated with Ball Quasi-Banach Function Spaces on Spaces of Homogeneous Type: Characterizations of Maximal Functions, Decompositions, and Dual Spaces
Stability for Critical Points of the Hardy--Littlewood--Sobolev Inequality and a Dual Stability Framework
Key Laboratory of Algebraic Lie Theory and Analysis of Ministry of Education, School of Mathematics and Statistics, Beijing Institute of Technology(教育部代数Lie理论与分析重点实验室,数学与统计学院,北京理工大学);Department of Mathematics, University of Connecticut(康涅狄格大学数学系);Laboratory of Mathematics and Complex Systems (Ministry of Education), School of Mathematical Sciences, Beijing Normal University(教育部数学与复杂系统重点实验室,数学科学学院,北京师范大学)
Real-Variable Characterizations of Local Hardy Spaces on Spaces of Homogeneous Type
设$(X,d,μ)$是齐型空间,其上维数为$μ$,在R意义下. R. Coifman和G.外斯设$η$为P. Auscher和T.海托宁利用局部极大函数引入了局部Hardy空间$h^{*,p}(X)$,并利用局部径向极大函数、局部非切极大函数、局部原子和局部Littlewood-Paley函数刻画了$h^{*,p}(X)$.进一步建立了整体Hardy空间与局部Hardy空间之间的关系。最后,得到了$h^{*,p}(X)$的有限原子刻画.作为应用,给出了当$p\in(ω/(ω+η),1)$时$h^{*,p}(X)$的对偶空间,进一步完善了G. Dafni和H. Yue关于$h^{*,1}(X)$的对偶空间.本文还回答了R. R. Coifman和G. Weiss关于任何额外的几何假设的不必要性,除了当$μ(X)<\infty$时$H^1_{\mathrm{cw}}(X)$的径向极大函数特征化的加倍条件。
The Hardy averaging operator between Orlicz spaces and a new gauge functional characterizing a given Orlicz space
Institute of Mathematics, Academy of Science of the Czech Republic(捷克科学院数学研究所);Department of Mathematics, Brock University(布鲁克大学数学系);Quantitative Science Department, Canisius University(卡尼西厄斯大学定量科学系)