Abstract and Applied Analysis
Volume 2008 (2008), Article ID 792160, 10 pages
doi:10.1155/2008/792160
A class of nonlinear integral operators preserving double subordinations
Oh Sang Kwon1
and Nak Eun Cho2
1Department of Mathematics, Kyungsung University, Pusan 608-736, South Korea
2Department of Applied Mathematics, Pukyong National University, Pusan 608-737, South Korea
Abstract
The purpose of the present paper is to investigate some subordination- and superordination-preserving properties of certain integral operators defined on the space of meromorphic functions in the punctured open unit disk. The sandwich-type theorem for these integral operators is also considered.