Reinhardt域上的双全纯映照与Roper-Suffridge算子*
2017-12-29王朝君崔艳艳朱思峰
王朝君, 崔艳艳, 刘 浩, 朱思峰
(1. 周口师范学院 数学与统计学院, 河南 周口 466001; 2. 河南大学 数学与统计学院, 河南 开封 475001)
Reinhardt域上的双全纯映照与Roper-Suffridge算子*
王朝君1, 崔艳艳1, 刘 浩2, 朱思峰1
(1. 周口师范学院 数学与统计学院, 河南 周口 466001; 2. 河南大学 数学与统计学院, 河南 开封 475001)
螺形映照; 星形映照; Roper-Suffridge算子
Roper-Suffridge算子在多复变函数论中占有重要的位置, 通过该算子可以由单复变中的双全纯函数构造多复变中相应的映照.目前对于该算子的研究已经取得了许多很好的结论[1-6]. 2013年夏红川[7]引入了推广的Roper-Suffridge算子
令
q(z1)=
则
且|q(z1)|<1, 由Schwarz-Pick引理[11]有
由式(3)及引理1知
其中
于是, 由式(4)及引理2知
证明由强α次殆β型螺形映照的定义[13]须证
即
由式(6)及引理1知
由式(7)及引理2知
|H(z)|≤
注2 在定理2中分别令α=0及β=0, 则得到相应的强β型螺形映照及强α次殆星形映照的结论, 与文献[7]的结论相一致.
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BiholomorphicMappingsonReinhardtDomainsandGeneralizedRoper-SuffridgeOperators
WANG Chao-jun1, CUI Yan-yan1, LIU Hao2, ZHU Si-feng1
(1. School of Mathematics and Statistics, Zhoukou Normal University, Zhoukou 466001, China; 2. School of Mathematics and Statistics, Henan University, Kaifeng 475001, China)
spirallike mappings; starlike mappings; Roper-Suffridge operator
1673-3193(2017)03-0273-04
2016-08-30
国家自然科学基金资助项目(11271359, U1204618); 河南省教育厅科学技术研究重点资助项目(14B110016); 河南省科技厅科技发展计划资助项目(102400450003)
王朝君(1981-), 男, 讲师, 硕士, 主要从事多复变函数论, 微分方程的研究.
O174.56
A
10.3969/j.issn.1673-3193.2017.03.005