{"title":"Partial gradient regularity for parabolic systems with degenerate diffusion and Hölder continuous coefficients","authors":"","doi":"10.1016/j.na.2024.113691","DOIUrl":null,"url":null,"abstract":"<div><div>We consider vector valued weak solutions <span><math><mrow><mi>u</mi><mo>:</mo><msub><mrow><mi>Ω</mi></mrow><mrow><mi>T</mi></mrow></msub><mo>→</mo><msup><mrow><mi>R</mi></mrow><mrow><mi>N</mi></mrow></msup></mrow></math></span> with <span><math><mrow><mi>N</mi><mo>∈</mo><mi>N</mi></mrow></math></span> of degenerate or singular parabolic systems of type <span><span><span><math><mrow><msub><mrow><mi>∂</mi></mrow><mrow><mi>t</mi></mrow></msub><mi>u</mi><mo>−</mo><mi>div</mi><mspace></mspace><mi>a</mi><mrow><mo>(</mo><mi>z</mi><mo>,</mo><mi>u</mi><mo>,</mo><mi>D</mi><mi>u</mi><mo>)</mo></mrow><mo>=</mo><mn>0</mn><mspace></mspace><mtext>in</mtext><mspace></mspace><msub><mrow><mi>Ω</mi></mrow><mrow><mi>T</mi></mrow></msub><mo>=</mo><mi>Ω</mi><mo>×</mo><mrow><mo>(</mo><mn>0</mn><mo>,</mo><mi>T</mi><mo>)</mo></mrow><mo>,</mo></mrow></math></span></span></span>where <span><math><mi>Ω</mi></math></span> denotes an open set in <span><math><msup><mrow><mi>R</mi></mrow><mrow><mi>n</mi></mrow></msup></math></span> for <span><math><mrow><mi>n</mi><mo>≥</mo><mn>1</mn></mrow></math></span> and <span><math><mrow><mi>T</mi><mo>></mo><mn>0</mn></mrow></math></span> a finite time. Assuming that the vector field <span><math><mi>a</mi></math></span> is not of Uhlenbeck-type structure, satisfies <span><math><mi>p</mi></math></span>-growth assumptions and <span><math><mrow><mrow><mo>(</mo><mi>z</mi><mo>,</mo><mi>u</mi><mo>)</mo></mrow><mo>↦</mo><mi>a</mi><mrow><mo>(</mo><mi>z</mi><mo>,</mo><mi>u</mi><mo>,</mo><mi>ξ</mi><mo>)</mo></mrow></mrow></math></span> is Hölder continuous for every <span><math><mrow><mi>ξ</mi><mo>∈</mo><msup><mrow><mi>R</mi></mrow><mrow><mi>N</mi><mi>n</mi></mrow></msup></mrow></math></span>, we show that the gradient <span><math><mrow><mi>D</mi><mi>u</mi></mrow></math></span> is partially Hölder continuous, provided the vector field degenerates like that of the <span><math><mi>p</mi></math></span>-Laplacian for small gradients.</div></div>","PeriodicalId":49749,"journal":{"name":"Nonlinear Analysis-Theory Methods & Applications","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nonlinear Analysis-Theory Methods & Applications","FirstCategoryId":"100","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0362546X24002104","RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
Abstract
We consider vector valued weak solutions with of degenerate or singular parabolic systems of type where denotes an open set in for and a finite time. Assuming that the vector field is not of Uhlenbeck-type structure, satisfies -growth assumptions and is Hölder continuous for every , we show that the gradient is partially Hölder continuous, provided the vector field degenerates like that of the -Laplacian for small gradients.
期刊介绍:
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