A Class of Integral Operators Preserving Subordination and Superordination for Analytic Functions

摘要

The purpose of the paper is to investigate several subordination-and superordination-preserving properties of a class of integraloperators, which are defined on the space of analytic functions inthe open unit disk. The sandwich-type theorem for these integraloperators is also presented. Moreover, we consider an applicationof the subordination and superordination theorem to the Gausshypergeometric function.