{"title":"Optimal convex domains for the first curl eigenvalue in dimension three","authors":"A. Enciso, Wadim Gerner, D. Peralta-Salas","doi":"10.1090/tran/8914","DOIUrl":null,"url":null,"abstract":"<p>We prove that there exists a bounded convex domain <inline-formula content-type=\"math/mathml\">\n<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" alttext=\"normal upper Omega subset-of double-struck upper R cubed\">\n <mml:semantics>\n <mml:mrow>\n <mml:mi mathvariant=\"normal\">Ω</mml:mi>\n <mml:mo>⊂</mml:mo>\n <mml:msup>\n <mml:mrow class=\"MJX-TeXAtom-ORD\">\n <mml:mi mathvariant=\"double-struck\">R</mml:mi>\n </mml:mrow>\n <mml:mn>3</mml:mn>\n </mml:msup>\n </mml:mrow>\n <mml:annotation encoding=\"application/x-tex\">\\Omega \\subset \\mathbb {R}^3</mml:annotation>\n </mml:semantics>\n</mml:math>\n</inline-formula> of fixed volume that minimizes the first positive curl eigenvalue among all other bounded convex domains of the same volume. We show that this optimal domain cannot be analytic, and that it cannot be stably convex if it is sufficiently smooth (e.g., of class <inline-formula content-type=\"math/mathml\">\n<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" alttext=\"upper C Superscript 1 comma 1\">\n <mml:semantics>\n <mml:msup>\n <mml:mi>C</mml:mi>\n <mml:mrow class=\"MJX-TeXAtom-ORD\">\n <mml:mn>1</mml:mn>\n <mml:mo>,</mml:mo>\n <mml:mn>1</mml:mn>\n </mml:mrow>\n </mml:msup>\n <mml:annotation encoding=\"application/x-tex\">C^{1,1}</mml:annotation>\n </mml:semantics>\n</mml:math>\n</inline-formula>). Existence results for uniformly Hölder optimal domains in a box (that is, contained in a fixed bounded domain <inline-formula content-type=\"math/mathml\">\n<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" alttext=\"upper D subset-of double-struck upper R cubed\">\n <mml:semantics>\n <mml:mrow>\n <mml:mi>D</mml:mi>\n <mml:mo>⊂</mml:mo>\n <mml:msup>\n <mml:mrow class=\"MJX-TeXAtom-ORD\">\n <mml:mi mathvariant=\"double-struck\">R</mml:mi>\n </mml:mrow>\n <mml:mn>3</mml:mn>\n </mml:msup>\n </mml:mrow>\n <mml:annotation encoding=\"application/x-tex\">D\\subset \\mathbb {R}^3</mml:annotation>\n </mml:semantics>\n</mml:math>\n</inline-formula>) are also presented.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"32 3","pages":""},"PeriodicalIF":17.7000,"publicationDate":"2024-04-24","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/10.1090/tran/8914","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
We prove that there exists a bounded convex domain Ω⊂R3\Omega \subset \mathbb {R}^3 of fixed volume that minimizes the first positive curl eigenvalue among all other bounded convex domains of the same volume. We show that this optimal domain cannot be analytic, and that it cannot be stably convex if it is sufficiently smooth (e.g., of class C1,1C^{1,1}). Existence results for uniformly Hölder optimal domains in a box (that is, contained in a fixed bounded domain D⊂R3D\subset \mathbb {R}^3) are also presented.
期刊介绍:
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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