摘要
给定单位圆盘D={z||z|<1}上调和映照f(z)=h(z)+g(z),其中h(z)和g(z)为D上的解析函数,满足f(0)=0,λf(0)=1,ΛfΛ.通过引入复参数λ,|λ|=1,本文研究调和映照Fλ(z)=h(z)+λg(z)和解析函数Gλ(z)=h(z)+λg(z)的性质,得到Fλ(z)和Gλ(z)单叶半径的精确估计.作为应用,本文得到单位圆盘D上某些K-拟正则调和映照Bloch常数的更好估计,改进和推广由Chen等人所得的相应结果.
Given harmonic mappings f(z) = h(z) + g(z) on the unit disk D = {z | |z| &lt; 1}, where h(z) and g(z) are analytic functions on the unit disk D, with f(0) = 0, λf(0) = 1 and Λf Λ, by introducing one complex parameter λ, we consider the properties for the harmonic mappings Fλ(z) = h(z) + λg(z) and analytic functions Gλ(z) = h(z) + λg(z) with |λ| = 1 and obtain the sharp estimate on univalent radius for Fλ(z) and Gλ(z). As an application, we also obtain a better estimate on Bloch constant for some K-quasiregular harmonic mappings on the unit disk D. Our results generalize and improve the one made by Chen et al.(2000).
出处
《中国科学:数学》
CSCD
北大核心
2014年第6期685-692,共8页
Scientia Sinica:Mathematica
基金
福建省自然科学基金(批准号:2011J0101)
国家青年自然科学基金(批准号:11101165)资助项目
关键词
调和映照
拟正则调和映照
单叶半径
BLOCH常数
harmonic mappings
quasi-regular harmonic mappings
univalent radius
Bloch constant