dorsal/arxiv
View SchemaRegularity theory for sub-critical $p$-parabolic systems with measurable coefficients
| Authors | Verena Bögelein, Frank Duzaar, Ugo Gianazza, Naian Liao |
|---|---|
| Categories | |
| ArXiv ID | 2601.08466vv1 |
| URL | https://arxiv.org/abs/2601.08466 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
A quantitative regularity theory is developed for weak solutions to the parabolic system $$ \partial_t u-\mathrm{div}\,{\boldsymbol{\mathsf A}}(x,t,Du)=0 \quad\text{in }E_T\subset \mathbb{R}^N\times\mathbb{R}, $$ which features the $p$-Laplacian with measurable coefficients. We focus on the sub-critical range $1<p\le \tfrac{2N}{N+2}$ and obtain two main results. \emph{Local boundedness:} starting from an $L^{\boldsymbol{\mathsf r}}$-control of $u$ with ${\boldsymbol{\mathsf r}}>\frac{N(2-p)}{p}$, we derive sharp, scale-invariant $L^\infty$-estimates. \emph{Higher integrability of the gradient:} $|Du|$ self-improves from $L^p_{\mathrm{loc}}$ to $L^{p(1+\varepsilon)}_{\mathrm{loc}}$ for some $\varepsilon>0$ depending only on the data. The same results still hold given proper source terms.
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"abstract": "A quantitative regularity theory is developed for weak solutions to the parabolic system $$ \\partial_t u-\\mathrm{div}\\,{\\boldsymbol{\\mathsf A}}(x,t,Du)=0 \\quad\\text{in }E_T\\subset \\mathbb{R}^N\\times\\mathbb{R}, $$ which features the $p$-Laplacian with measurable coefficients. We focus on the sub-critical range $1\u003cp\\le \\tfrac{2N}{N+2}$ and obtain two main results. \\emph{Local boundedness:} starting from an $L^{\\boldsymbol{\\mathsf r}}$-control of $u$ with ${\\boldsymbol{\\mathsf r}}\u003e\\frac{N(2-p)}{p}$, we derive sharp, scale-invariant $L^\\infty$-estimates. \\emph{Higher integrability of the gradient:} $|Du|$ self-improves from $L^p_{\\mathrm{loc}}$ to $L^{p(1+\\varepsilon)}_{\\mathrm{loc}}$ for some $\\varepsilon\u003e0$ depending only on the data. The same results still hold given proper source terms.",
"arxiv_id": "2601.08466",
"authors": [
"Verena B\u00f6gelein",
"Frank Duzaar",
"Ugo Gianazza",
"Naian Liao"
],
"categories": [
"math.AP"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Regularity theory for sub-critical $p$-parabolic systems with measurable coefficients",
"url": "https://arxiv.org/abs/2601.08466",
"version": "v1"
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