Coefficient problems for a class of analytic functions involving Hadamard products

[摘要] For $00$, let $MS(Phi,Psi;lambda,alpha,eta)$ be the class of functions defined in the open unit disc $D$. Sharp upper bound is obtained for the functional $|a_{3}-mu a_{2}^2|$ when $muge 1$.

[学科分类] 数学（综合）

[关键词] univalent functions.