Region of variability for close-to-convex functions-II
Region of variability for close-to-convex functions-II
复制标题
接近凸函数的可变区域-II
DOI:
10.1016/j.amc.2009.06.012
复制
发表时间:
2009
期刊:
影响因子:
--
通讯作者:
H. Yanagihara
中科院分区:
文献类型:
--
作者:
S. Ponnusamy;A. Vasudevarao;H. Yanagihara
For a complex number α with Reα>0 let Kϕ(α) be the class of analytic functions f in the unit disk D with f(0)=0 satisfying Re(f′(z)/ϕ′(z))>0 in D,f′(0)/ϕ′(0)=α, for some convex univalent function ϕ in D. For any fixed z0∈D, and λ∈D¯ we shall determine the region of variability Vϕ(z0,α,λ) for f(z0) when f ranges over the class In the final section we graphically illustrate the region of variability for several sets of parameters z0and α.