{"title":"与加权移位算子交织的算子的超不变子空间","authors":"Z. Dali, A. Segres","doi":"10.1007/s10476-024-00023-y","DOIUrl":null,"url":null,"abstract":"<div><p>Suppose that <span>\\(T\\)</span> is an absolutely continuous polynomially bounded operator, <span>\\(S_{\\omega}\\)</span> is a bilateral weighted shift, there exists a <span>\\(\\phi\\in \\mathbb{H}^{\\infty}\\)</span> such that <span>\\(\\ker \\phi(S_{\\omega}^{*})\\neq \\{0\\}\\)</span> and \n a nonzero operator <span>\\(X\\)</span> such that <span>\\(S^{(\\infty)}_{\\omega}X=XT\\)</span>, where <span>\\(S^{(\\infty)}_{\\omega}\\)</span> is the infinite countable orthogonal sum of copies of <span>\\(S_{\\omega}\\)</span>. We prove that <span>\\(T\\)</span> has nontrivial hyperinvariant subspaces, that are the closures of <span>\\(\\text{Ran} \\psi(T)\\)</span> for some <span>\\(\\psi \\in \\mathbb{H}^{\\infty}\\)</span>.</p></div>","PeriodicalId":55518,"journal":{"name":"Analysis Mathematica","volume":null,"pages":null},"PeriodicalIF":0.6000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hyperinvariant subspaces for operators intertwined with weighted shift operators\",\"authors\":\"Z. Dali, A. Segres\",\"doi\":\"10.1007/s10476-024-00023-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Suppose that <span>\\\\(T\\\\)</span> is an absolutely continuous polynomially bounded operator, <span>\\\\(S_{\\\\omega}\\\\)</span> is a bilateral weighted shift, there exists a <span>\\\\(\\\\phi\\\\in \\\\mathbb{H}^{\\\\infty}\\\\)</span> such that <span>\\\\(\\\\ker \\\\phi(S_{\\\\omega}^{*})\\\\neq \\\\{0\\\\}\\\\)</span> and \\n a nonzero operator <span>\\\\(X\\\\)</span> such that <span>\\\\(S^{(\\\\infty)}_{\\\\omega}X=XT\\\\)</span>, where <span>\\\\(S^{(\\\\infty)}_{\\\\omega}\\\\)</span> is the infinite countable orthogonal sum of copies of <span>\\\\(S_{\\\\omega}\\\\)</span>. We prove that <span>\\\\(T\\\\)</span> has nontrivial hyperinvariant subspaces, that are the closures of <span>\\\\(\\\\text{Ran} \\\\psi(T)\\\\)</span> for some <span>\\\\(\\\\psi \\\\in \\\\mathbb{H}^{\\\\infty}\\\\)</span>.</p></div>\",\"PeriodicalId\":55518,\"journal\":{\"name\":\"Analysis Mathematica\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2024-05-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Analysis Mathematica\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10476-024-00023-y\",\"RegionNum\":3,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analysis Mathematica","FirstCategoryId":"100","ListUrlMain":"https://link.springer.com/article/10.1007/s10476-024-00023-y","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
Hyperinvariant subspaces for operators intertwined with weighted shift operators
Suppose that \(T\) is an absolutely continuous polynomially bounded operator, \(S_{\omega}\) is a bilateral weighted shift, there exists a \(\phi\in \mathbb{H}^{\infty}\) such that \(\ker \phi(S_{\omega}^{*})\neq \{0\}\) and
a nonzero operator \(X\) such that \(S^{(\infty)}_{\omega}X=XT\), where \(S^{(\infty)}_{\omega}\) is the infinite countable orthogonal sum of copies of \(S_{\omega}\). We prove that \(T\) has nontrivial hyperinvariant subspaces, that are the closures of \(\text{Ran} \psi(T)\) for some \(\psi \in \mathbb{H}^{\infty}\).
期刊介绍:
Traditionally the emphasis of Analysis Mathematica is classical analysis, including real functions (MSC 2010: 26xx), measure and integration (28xx), functions of a complex variable (30xx), special functions (33xx), sequences, series, summability (40xx), approximations and expansions (41xx).
The scope also includes potential theory (31xx), several complex variables and analytic spaces (32xx), harmonic analysis on Euclidean spaces (42xx), abstract harmonic analysis (43xx).
The journal willingly considers papers in difference and functional equations (39xx), functional analysis (46xx), operator theory (47xx), analysis on topological groups and metric spaces, matrix analysis, discrete versions of topics in analysis, convex and geometric analysis and the interplay between geometry and analysis.