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arXiv 2409.07152math.CA
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一类奇异积分算子在变指数Herz-Morrey空间中的加权有界性

Weighted bounds for a class of singular integral operators in variable exponent Herz-Morrey spaces

Yanqi Yang, Qi Wu

AI总结:

本文研究变核奇异积分算子相关算子的有界性,通过球调和展开与卷积算子估计,证明其在带权变指数广义Herz-Morrey空间的有界性并推广已有结果,还建立了算子乘积与伪乘积的范数刻画。

摘要:

设T是具有变核的奇异积分算子,定义为$Tf(x)= p.v. \int_{\mathbb{R}^{n}}K(x,x-y)f(y)\mathrm{d}y$,$D^γ(0≤γ≤1)$为分数次微分算子,其中$K(x,z)=\frac{Ω(x,z')}{|z|^{n}}$,$z'=\frac{z}{|z|}$,$z≠0$。设$T^{\ast}$和$T^\sharp$分别为T的伴随算子与伪伴随算子。本文通过球调和展开及卷积算子$T_{m,j}$的估计,在指数函数满足自然正则性假设的条件下,证明了$TD^γ-D^γT$与$(T^{\ast}-T^{\sharp})D^γ$在一类带权变指数广义Herz-Morrey空间上的若干有界性结果,推广了已有结论。此外,还建立了乘积$T_{1}T_{2}$与伪乘积$T_{1}\circ T_{2}$的多种范数刻画。

英文摘要:

Let T be the singular integral operator with variable kernel defined by $Tf(x)= p.v. \int_{\mathbb{R}^{n}}K(x,x-y)f(y)\mathrm{d}y$ and $D^γ(0\leqγ\leq1)$ be the fractional differentiation operator, where $K(x,z)=\frac{Ω(x,z')}{|z|^{n}}$, $z'=\frac{z}{|z|},~~z\neq0$. Let $~T^{\ast}~$and $~T^\sharp~$ be the adjoint of $T$ and the pseudo-adjoint of $T$, respectively. In this paper, via the expansion of spherical harmonics and the estimates of the convolution operators $T_{m,j}$, we shall prove some boundedness results for $TD^γ-D^γT$ and $(T^{\ast}-T^{\sharp})D^γ$ under natural regularity assumptions on the exponent function on a class of generalized Herz-Morrey spaces with weight and variable exponent, which extend some known results. Moreover, various norm characterizations for the product $T_{1}T_{2}$ and the pseudo-product $T_{1}\circ T_{2}$ are also established.

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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