Volume 33 • Number 3 • 2010   • A Class of Integral Operators Preserving Subordination and Superordination Nak Eun Cho and Oh Sang Kwon Abstract. The purpose of the present paper is to obtain subordination- and superordination-preserving properties for a class of integral operators defined on the space of normalized analytic functions in the open unit disk. We also consider the sandwich-type theorems for these integral operators. 2010 Mathematics Subject Classification: Primary: 30C80; Secondary 30C25, 30C45 Full text: PDF