{"title":"Positive solution for an elliptic system with critical exponent and logarithmic terms: the higher-dimensional cases","authors":"","doi":"10.1007/s11784-024-01099-7","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>In this paper, we consider the coupled elliptic system with critical exponent and logarithmic terms: <span> <span>$$\\begin{aligned} {\\left\\{ \\begin{array}{ll} -\\Delta u=\\lambda _{1}u+ \\mu _1|u|^{2p-2}u+\\beta |u|^{p-2}|v|^{p}u+\\theta _1 u\\log u^2, &{} \\quad x\\in \\Omega ,\\\\ -\\Delta v=\\lambda _{2}v+ \\mu _2|v|^{2p-2}v+\\beta |u|^{p}|v|^{p-2}v+\\theta _2 v\\log v^2, &{}\\quad x\\in \\Omega ,\\\\ u=v=0, &{}\\quad x \\in \\partial \\Omega , \\end{array}\\right. } \\end{aligned}$$</span> </span>where <span> <span>\\(\\Omega \\subset {\\mathbb R}^N\\)</span> </span> is a bounded smooth domain, <span> <span>\\(2p=2^*=\\frac{2N}{N-2}\\)</span> </span> is the Sobolev critical exponent. When <span> <span>\\(N \\ge 5\\)</span> </span>, for different ranges of <span> <span>\\(\\beta ,\\lambda _{i},\\mu _i,\\theta _{i}\\)</span> </span>, <span> <span>\\(i=1,2\\)</span> </span>, we obtain existence and nonexistence results of positive solutions via variational methods. The special case <span> <span>\\(N=4 \\)</span> </span> was studied by Hajaiej et al. (Positive solution for an elliptic system with critical exponent and logarithmic terms, arXiv:2304.13822, 2023). Note that for <span> <span>\\(N\\ge 5\\)</span> </span>, the critical exponent is given by <span> <span>\\(2p\\in \\left( 2,4\\right) \\)</span> </span>; whereas for <span> <span>\\(N=4\\)</span> </span>, it is <span> <span>\\(2p=4\\)</span> </span>. In the higher-dimensional cases <span> <span>\\(N\\ge 5\\)</span> </span> brings new difficulties, and requires new ideas. Besides, we also study the Brézis–Nirenberg problem with logarithmic perturbation <span> <span>$$\\begin{aligned} -\\Delta u=\\lambda u+\\mu |u|^{2p-2}u+\\theta u \\log u^2 \\quad \\text { in }\\Omega , \\end{aligned}$$</span> </span>where <span> <span>\\(\\mu >0, \\theta <0\\)</span> </span>, <span> <span>\\(\\lambda \\in {\\mathbb R}\\)</span> </span>, and obtain the existence of positive local minimum and least energy solution under some certain assumptions.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1007/s11784-024-01099-7","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, we consider the coupled elliptic system with critical exponent and logarithmic terms: $$\begin{aligned} {\left\{ \begin{array}{ll} -\Delta u=\lambda _{1}u+ \mu _1|u|^{2p-2}u+\beta |u|^{p-2}|v|^{p}u+\theta _1 u\log u^2, &{} \quad x\in \Omega ,\\ -\Delta v=\lambda _{2}v+ \mu _2|v|^{2p-2}v+\beta |u|^{p}|v|^{p-2}v+\theta _2 v\log v^2, &{}\quad x\in \Omega ,\\ u=v=0, &{}\quad x \in \partial \Omega , \end{array}\right. } \end{aligned}$$where \(\Omega \subset {\mathbb R}^N\) is a bounded smooth domain, \(2p=2^*=\frac{2N}{N-2}\) is the Sobolev critical exponent. When \(N \ge 5\), for different ranges of \(\beta ,\lambda _{i},\mu _i,\theta _{i}\), \(i=1,2\), we obtain existence and nonexistence results of positive solutions via variational methods. The special case \(N=4 \) was studied by Hajaiej et al. (Positive solution for an elliptic system with critical exponent and logarithmic terms, arXiv:2304.13822, 2023). Note that for \(N\ge 5\), the critical exponent is given by \(2p\in \left( 2,4\right) \); whereas for \(N=4\), it is \(2p=4\). In the higher-dimensional cases \(N\ge 5\) brings new difficulties, and requires new ideas. Besides, we also study the Brézis–Nirenberg problem with logarithmic perturbation $$\begin{aligned} -\Delta u=\lambda u+\mu |u|^{2p-2}u+\theta u \log u^2 \quad \text { in }\Omega , \end{aligned}$$where \(\mu >0, \theta <0\), \(\lambda \in {\mathbb R}\), and obtain the existence of positive local minimum and least energy solution under some certain assumptions.
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Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
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