Abstract and Applied Analysis
Volume 2008 (2008), Article ID 792160, 10 pages
A Class of Nonlinear Integral Operators Preserving Double Subordinations
1Department of Mathematics, Kyungsung University, Pusan 608-736, South Korea
2Department of Applied Mathematics, Pukyong National University, Pusan 608-737, South Korea
Received 15 February 2008; Accepted 8 May 2008
Academic Editor: Stevo Stevic
Copyright © 2008 Oh Sang Kwon and Nak Eun Cho. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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.