{"title":"居中算子的诱导阿卢斯格变换的迭代极限","authors":"Hiroyuki Osaka, Takeaki Yamazaki","doi":"arxiv-2409.03338","DOIUrl":null,"url":null,"abstract":"Aluthge transform is a well-known mapping defined on bounded linear\noperators. Especially, the convergence property of its iteration has been\nstudied by many authors. In this paper, we discuss the problem for the induced\nAluthge transforms which is a generalization of the Aluthge transform defined\nin 2021. We give the polar decomposition of the induced Aluthge transformations\nof centered operators and show its iteration converges to a normal operator. In\nparticular, if $T$ is an invertible centered matrix, then iteration of any\ninduced Aluthge transformations converges. Using the canonical standard form of\nmatrix algebras we show that the iteration of any induced Aluthge\ntransformations with respect to the weighted arithmetic mean and the power mean\nconverge. Those observation are extended to the $C^*$-algebra of compact\noperators on an infinite dimensional Hilbert space, and as an application we\nshow the stability of $\\mathcal{AN}$ and $\\mathcal{AM}$ properties under the\niteration of the induced Aluthge transformations. We also provide concrete\nforms of their limit points for centered matrices and several examples.\nMoreover, we discuss the limit point of the induced Aluthge transformation with\nrespect to the power mean in the injective $II_1$-factor $\\mathcal{M}$ and\ndetermine the form of its limit for some centered operators in $\\mathcal{M}$.","PeriodicalId":501114,"journal":{"name":"arXiv - MATH - Operator Algebras","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Limit of iteration of the induced Aluthge transformations of centered operators\",\"authors\":\"Hiroyuki Osaka, Takeaki Yamazaki\",\"doi\":\"arxiv-2409.03338\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Aluthge transform is a well-known mapping defined on bounded linear\\noperators. Especially, the convergence property of its iteration has been\\nstudied by many authors. In this paper, we discuss the problem for the induced\\nAluthge transforms which is a generalization of the Aluthge transform defined\\nin 2021. We give the polar decomposition of the induced Aluthge transformations\\nof centered operators and show its iteration converges to a normal operator. In\\nparticular, if $T$ is an invertible centered matrix, then iteration of any\\ninduced Aluthge transformations converges. Using the canonical standard form of\\nmatrix algebras we show that the iteration of any induced Aluthge\\ntransformations with respect to the weighted arithmetic mean and the power mean\\nconverge. Those observation are extended to the $C^*$-algebra of compact\\noperators on an infinite dimensional Hilbert space, and as an application we\\nshow the stability of $\\\\mathcal{AN}$ and $\\\\mathcal{AM}$ properties under the\\niteration of the induced Aluthge transformations. We also provide concrete\\nforms of their limit points for centered matrices and several examples.\\nMoreover, we discuss the limit point of the induced Aluthge transformation with\\nrespect to the power mean in the injective $II_1$-factor $\\\\mathcal{M}$ and\\ndetermine the form of its limit for some centered operators in $\\\\mathcal{M}$.\",\"PeriodicalId\":501114,\"journal\":{\"name\":\"arXiv - MATH - Operator Algebras\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - MATH - Operator Algebras\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.03338\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - MATH - Operator Algebras","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.03338","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Limit of iteration of the induced Aluthge transformations of centered operators
Aluthge transform is a well-known mapping defined on bounded linear
operators. Especially, the convergence property of its iteration has been
studied by many authors. In this paper, we discuss the problem for the induced
Aluthge transforms which is a generalization of the Aluthge transform defined
in 2021. We give the polar decomposition of the induced Aluthge transformations
of centered operators and show its iteration converges to a normal operator. In
particular, if $T$ is an invertible centered matrix, then iteration of any
induced Aluthge transformations converges. Using the canonical standard form of
matrix algebras we show that the iteration of any induced Aluthge
transformations with respect to the weighted arithmetic mean and the power mean
converge. Those observation are extended to the $C^*$-algebra of compact
operators on an infinite dimensional Hilbert space, and as an application we
show the stability of $\mathcal{AN}$ and $\mathcal{AM}$ properties under the
iteration of the induced Aluthge transformations. We also provide concrete
forms of their limit points for centered matrices and several examples.
Moreover, we discuss the limit point of the induced Aluthge transformation with
respect to the power mean in the injective $II_1$-factor $\mathcal{M}$ and
determine the form of its limit for some centered operators in $\mathcal{M}$.