TWO PROBLEMS ABOUT COMPOSITION OPERATORS ON HARDY SPACE

In this paper, two problems about composition operator on Hardy space are considered. Firstly, a new estimation of the norm of a class of composition operators is given. Secondly, the cyclic behavior of the adjoint operator of a composition operator is discussed.

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Bibliographic Details
Published inActa mathematica scientia Vol. 25; no. 3; pp. 515 - 524
Main Author 吴树宏 王茂发 刘培德
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.07.2005
Department of Mathematics, Huazhong Un rsity of Science and Technology, Wuhan 430074, China%School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China
Subjects
30D45
47B38
composition operator
cyclic vector
Hardy space
numerical range
哈迪空间
复合算子
循环矢量
数值域
numerical range
composition operator
47B38
cyclic vector
30D45
Hardy space
Online AccessGet full text
ISSN0252-9602
1572-9087
DOI10.1016/S0252-9602(05)60015-X

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Summary:In this paper, two problems about composition operator on Hardy space are considered. Firstly, a new estimation of the norm of a class of composition operators is given. Secondly, the cyclic behavior of the adjoint operator of a composition operator is discussed.
Bibliography:O177.6
42-1227/O
ISSN:0252-9602
1572-9087
DOI:10.1016/S0252-9602(05)60015-X