{"title":"Beurling’s theorem for the Hardy operator on \\(L^2[0,1]\\)","authors":"Jim Agler, John E. McCarthy","doi":"10.1007/s44146-023-00073-y","DOIUrl":null,"url":null,"abstract":"<div><p>We prove that the invariant subspaces of the Hardy operator on <span>\\(L^2[0,1]\\)</span> are the spaces that are limits of sequences of finite dimensional spaces spanned by monomial functions.</p></div>","PeriodicalId":46939,"journal":{"name":"ACTA SCIENTIARUM MATHEMATICARUM","volume":"89 3-4","pages":"573 - 592"},"PeriodicalIF":0.5000,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACTA SCIENTIARUM MATHEMATICARUM","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1007/s44146-023-00073-y","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 2
Abstract
We prove that the invariant subspaces of the Hardy operator on \(L^2[0,1]\) are the spaces that are limits of sequences of finite dimensional spaces spanned by monomial functions.