{"title":"关于巴拿赫空间中涉及 2p 面积函数的一类函数的莫尔斯同源性的说明","authors":"Luca Asselle, Maciej Starostka","doi":"10.1007/s00030-024-00962-3","DOIUrl":null,"url":null,"abstract":"<p>In this paper we show how to construct Morse homology for an explicit class of functionals involving the 2<i>p</i>-area functional. The natural domain of definition of such functionals is the Banach space <span>\\(W^{1,2p}_0(\\Omega )\\)</span>, where <span>\\(p>n/2\\)</span> and <span>\\(\\Omega \\subset \\mathbb {R}^n\\)</span> is a bounded domain with sufficiently smooth boundary. As <span>\\(W^{1,2p}_0(\\Omega )\\)</span> is not isomorphic to its dual space,critical points of such functionals cannot be non-degenerate in the usual sense, and hence in the construction of Morse homology we only require that the second differential at each critical point be injective. Our result upgrades, in the case <span>\\(p>n/2\\)</span>, the results in Cingolani and Vannella (Ann Inst H Poincaré Anal Non Linéaire 2:271–292, 2003; Ann Mat Pura Appl 186:155–183, 2007), where critical groups for an analogous class of functionals are computed, and provides in this special case a positive answer to Smale’s suggestion that injectivity of the second differential should be enough for Morse theory</p>","PeriodicalId":501665,"journal":{"name":"Nonlinear Differential Equations and Applications (NoDEA)","volume":"61 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A note on the Morse homology for a class of functionals in Banach spaces involving the 2p-area functional\",\"authors\":\"Luca Asselle, Maciej Starostka\",\"doi\":\"10.1007/s00030-024-00962-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In this paper we show how to construct Morse homology for an explicit class of functionals involving the 2<i>p</i>-area functional. The natural domain of definition of such functionals is the Banach space <span>\\\\(W^{1,2p}_0(\\\\Omega )\\\\)</span>, where <span>\\\\(p>n/2\\\\)</span> and <span>\\\\(\\\\Omega \\\\subset \\\\mathbb {R}^n\\\\)</span> is a bounded domain with sufficiently smooth boundary. As <span>\\\\(W^{1,2p}_0(\\\\Omega )\\\\)</span> is not isomorphic to its dual space,critical points of such functionals cannot be non-degenerate in the usual sense, and hence in the construction of Morse homology we only require that the second differential at each critical point be injective. Our result upgrades, in the case <span>\\\\(p>n/2\\\\)</span>, the results in Cingolani and Vannella (Ann Inst H Poincaré Anal Non Linéaire 2:271–292, 2003; Ann Mat Pura Appl 186:155–183, 2007), where critical groups for an analogous class of functionals are computed, and provides in this special case a positive answer to Smale’s suggestion that injectivity of the second differential should be enough for Morse theory</p>\",\"PeriodicalId\":501665,\"journal\":{\"name\":\"Nonlinear Differential Equations and Applications (NoDEA)\",\"volume\":\"61 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-06-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nonlinear Differential Equations and Applications (NoDEA)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1007/s00030-024-00962-3\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nonlinear Differential Equations and Applications (NoDEA)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1007/s00030-024-00962-3","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
在本文中,我们展示了如何为一类明确的涉及 2p 面积函数的函数构建莫尔斯同调。这类函数的自然定义域是巴拿赫空间(W^{1,2p}_0(\Omega )\),其中\(p>n/2\)和\(\Omega \子集\mathbb {R}^n\) 是一个具有足够光滑边界的有界域。由于 \(W^{1,2p}_0(\Omega )\) 与它的对偶空间不是同构的,所以这种函数的临界点不可能是通常意义上的非退化的,因此在莫尔斯同源性的构造中,我们只要求每个临界点上的二次微分是注入的。在 \(p>n/2\) 的情况下,我们的结果升级了 Cingolani 和 Vannella(Ann Inst H Poincaré Anal Non Linéaire 2:271-292, 2003; Ann Mat Pura Appl 186:155-183, 2007)的结果,其中计算了一类类似函数的临界群,并在这种特殊情况下对 Smale 提出的第二微分的注入性应该足以满足莫尔斯理论的要求做出了正面回答
A note on the Morse homology for a class of functionals in Banach spaces involving the 2p-area functional
In this paper we show how to construct Morse homology for an explicit class of functionals involving the 2p-area functional. The natural domain of definition of such functionals is the Banach space \(W^{1,2p}_0(\Omega )\), where \(p>n/2\) and \(\Omega \subset \mathbb {R}^n\) is a bounded domain with sufficiently smooth boundary. As \(W^{1,2p}_0(\Omega )\) is not isomorphic to its dual space,critical points of such functionals cannot be non-degenerate in the usual sense, and hence in the construction of Morse homology we only require that the second differential at each critical point be injective. Our result upgrades, in the case \(p>n/2\), the results in Cingolani and Vannella (Ann Inst H Poincaré Anal Non Linéaire 2:271–292, 2003; Ann Mat Pura Appl 186:155–183, 2007), where critical groups for an analogous class of functionals are computed, and provides in this special case a positive answer to Smale’s suggestion that injectivity of the second differential should be enough for Morse theory