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.
作 者： WU Shuhong WANG Maofa Liu Peide 作者单位： WU Shuhong(Department of Mathematics, Huazhong Un rsity of Science and Technology, Wuhan 430074, China)WANG Maofa,Liu Peide(School of Mathematics and Statistics, Wuhan University, Wuhan 430072, China)
刊 名： 数学物理学报（英文版） ISTIC SCI 英文刊名： ACTA MATHEMATICA SCIENTIA 年，卷(期)： 2005 25(3) 分类号： O41 关键词： Hardy space composition operator numerical range cyclic vector