arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2203.00835math.APmath.CA
收藏

外Lipschitz区域上的Riesz变换及其应用

Riesz transform on exterior Lipschitz domains and applications

Renjin Jiang, Fanghua Lin

AI总结:

该研究针对外Lipschitz区域上的一致椭圆算子,建立了Dirichlet与Neumann边值对应的Riesz变换在$L^p$空间的有界性,得到反向不等式,结果可推广至VMO系数算子与非齐次边值问题,拓展了相关算子理论。

摘要:

设${\mathscr{L}}=-\text{div}A\nabla$是$\mathbb{R}^n$($n\ge 2$)上的一致椭圆算子。设$\Omega$为外Lipschitz区域,${\mathscr{L}}_D$和${\mathscr{L}}_N$分别为$\Omega$上满足Dirichlet和Neumann边值的算子${\mathscr{L}}$。我们建立了Riesz变换$\nabla{\mathscr{L}}_D^{-1/2}$、$\nabla {\mathscr{L}}_N^{-1/2}$在$L^p$空间中的有界性。作为副产品,我们证明了对任意$1<p<\infty$,反向不等式$\\|{\mathscr{L}}_D^{1/2}f\\|_{L^p(\Omega)}\le C\\|\nabla f\\|_{L^p(\Omega)}$成立。该证明可推广至具有VMO系数的算子在外Lipschitz或$C^1$区域上的Riesz变换有界性。这些估计也可应用于非齐次Dirichlet和Neumann问题。这些结果即使对于外Lipschitz和$C^1$区域上Laplacian算子的Dirichlet和Neumann问题也是新的。

英文摘要:

Let ${\mathscr{L}}=-\text{div}A\nabla$ be a uniformly elliptic operator on $\mathbb{R}^n$, $n\ge 2$. Let $Ω$ be an exterior Lipschitz domain, and let ${\mathscr{L}}_D$ and ${\mathscr{L}}_N$ be the operator ${\mathscr{L}}$ on $Ω$ subject to the Dirichlet and Neumann boundary values, respectively. We establish the boundedness of the Riesz transforms $\nabla{\mathscr{L}}_D^{-1/2}$, $\nabla {\mathscr{L}}_N^{-1/2}$ in $L^p$ spaces. As a byproduct, we show the reverse inequality $\|{\mathscr{L}}_D^{1/2}f\|_{L^p(Ω)}\le C\|\nabla f\|_{L^p(Ω)}$ holds for any $1<p<\infty$. The proof can be generalized to show the boundedness of the Riesz transforms, for operators with VMO coefficients on exterior Lipschitz or $C^1$ domains. The estimates can be also applied to the inhomogeneous Dirichlet and Neumann problems. These results are new even for the Dirichlet and Neumann of the Laplacian operator on the exterior Lipschitz and $C^1$ domains.

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。

↑