A note on limiting Calderon-Zygmund theory for transformed $n$-Laplace systems in divergence form

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Main Authors: Martino, Dorian, Schikorra, Armin
Format: Preprint
Published: 2024
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author Martino, Dorian
Schikorra, Armin
author_facet Martino, Dorian
Schikorra, Armin
contents We consider rotated $n$-Laplace systems on the unit ball $B_1 \subset \mathbb{R}^n$ of the form \begin{align*} -\mathrm{div}\left( Q|\nabla u|^{n-2} \nabla u\right) = \mathrm{div}(G), \end{align*} where $u\in W^{1,n}(B_1;\mathbb{R}^N)$, $Q\in W^{1,n}(B_1;SO(N))$ and $G\in L^{\left( \frac{n}{n-1},q \right)}(B_1;\mathbb{R}^n\otimes \mathbb{R}^N)$ for some $0<q<\frac{n}{n-1}$. We prove that $\nabla u\in L^{(n,q(n-1))}_{loc}$ with estimates. As a corollary, we obtain that solutions to $Δ_n u \in \mathcal{H}^1$, where $\mathcal{H}^1$ is the Hardy space, have a higher integrability, namely $\nabla u \in L^{(n,n-1)}_{loc}$.
format Preprint
id arxiv_https___arxiv_org_abs_2404_01922
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle A note on limiting Calderon-Zygmund theory for transformed $n$-Laplace systems in divergence form
Martino, Dorian
Schikorra, Armin
Analysis of PDEs
We consider rotated $n$-Laplace systems on the unit ball $B_1 \subset \mathbb{R}^n$ of the form \begin{align*} -\mathrm{div}\left( Q|\nabla u|^{n-2} \nabla u\right) = \mathrm{div}(G), \end{align*} where $u\in W^{1,n}(B_1;\mathbb{R}^N)$, $Q\in W^{1,n}(B_1;SO(N))$ and $G\in L^{\left( \frac{n}{n-1},q \right)}(B_1;\mathbb{R}^n\otimes \mathbb{R}^N)$ for some $0<q<\frac{n}{n-1}$. We prove that $\nabla u\in L^{(n,q(n-1))}_{loc}$ with estimates. As a corollary, we obtain that solutions to $Δ_n u \in \mathcal{H}^1$, where $\mathcal{H}^1$ is the Hardy space, have a higher integrability, namely $\nabla u \in L^{(n,n-1)}_{loc}$.
title A note on limiting Calderon-Zygmund theory for transformed $n$-Laplace systems in divergence form
topic Analysis of PDEs
url https://arxiv.org/abs/2404.01922