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arXiv 2503.03301math.FA
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齐型空间上与球拟巴拿赫函数空间和非负自伴算子相关的局部Hardy空间及其应用

Local Hardy Spaces Associated with Ball Quasi-Banach Function Spaces and Non-negative Self-adjoint Operators on Spaces of Homogeneous Type and Their Applications

Xiong Liu, Wenhua Wang, Tiantian Zhao, Hongliang Zuo

AI总结:

本文在齐型空间框架下引入与球拟巴拿赫函数空间和非负自伴算子相关的局部Hardy空间,研究其性质并建立局部Riesz变换有界性、谱乘子定理等应用,推广了经典局部Hardy空间理论。

摘要:

设$(\boldsymbol{\rm X},d,\boldsymbol{\rm \u03bc})$是Coifman--Weiss意义下的齐型空间,$X$是$\boldsymbol{\rm X}$上满足适当极大函数和伴随空间假设的球拟巴拿赫函数空间,$L$是$L^2(\boldsymbol{\rm X})$上的非负自伴算子。假设对任意$t>0$,半群$e^{-tL}$的积分核满足高斯上界。本文引入并系统研究了与$X$和$L$相关的局部Hardy空间$h_L^X(\boldsymbol{\rm X})$,该空间通过局部Lusin面积函数结合适当的低频项定义。作为该理论的应用,我们针对二阶散度型椭圆算子,建立了局部Riesz变换$\boldsymbol{\rm \u2207}(L+\u03ba I)^{-1/2}$从$h_L^X(\boldsymbol{\rm R}^d)$到对应的$X$值向量函数空间的有界性。我们还得到了$h_L^X(\boldsymbol{\rm X})$上$F(L+I)$的Hörmander型谱乘子定理。最后,将抽象结果应用于局部Orlicz-Hardy空间、局部变指数Hardy空间和局部混合范数Hardy空间。该理论将Goldberg最初的局部Hardy空间理论[Duke Math. J. {\bf 46} (1979), 27-42; MR0523600]推广到齐型空间上的球拟巴拿赫函数空间和非负自伴算子框架下。据我们所知,本文所得的若干结果即使在欧氏情形$\boldsymbol{\rm X}:=\boldsymbol{\rm R}^d$下也是新的。

英文摘要:

Let $(\mathbb X,d,μ)$ be a space of homogeneous type in the sense of Coifman--Weiss, let $X$ be a ball quasi-Banach function space on $\mathbb X$ under suitable maximal-function and associate-space assumptions, and let $L$ be a non-negative self-adjoint operator on $L^2(\mathbb X)$. Assume that, for every $t>0$, the semigroup $e^{-tL}$ admits an integral kernel satisfying a Gaussian upper bound. In this paper, we introduce and systematically study the local Hardy space $h_L^X(\mathbb X)$ associated with $X$ and $L$, defined in terms of a local Lusin area function together with an appropriate low-frequency term. As applications of this theory, we establish the boundedness of the local Riesz transform $\nabla(L+κI)^{-1/2}$ from $h_L^X(\mathbb R^d)$ into the corresponding $X$-valued vector function space for second-order divergence-form elliptic operators. We also obtain a Hörmander-type spectral multiplier theorem for $F(L+I)$ on $h_L^X(\mathbb X)$. Finally, the abstract results are applied to local Orlicz-Hardy spaces, local variable Hardy spaces, and local mixed-norm Hardy spaces. This theory develops Goldberg's original local Hardy space theory [Duke Math. J. {\bf 46} (1979), 27-42; MR0523600] to the setting of ball quasi-Banach function spaces and non-negative self-adjoint operators on spaces of homogeneous type. To the best of our knowledge, several of the results obtained in this paper are new even in the Euclidean setting $\mathbb X:=\mathbb R^d$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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