Journal of Inequalities and Applications
Volume 2011 (2011), Article ID 486595, 17 pages
doi:10.1155/2011/486595
Research Article

Subordination and Superordination for Multivalent Functions Associated with the Dziok-Srivastava Operator

Nak Eun Cho,1 Oh Sang Kwon,2 Rosihan M. Ali,3 and V. Ravichandran3,4

1Department of Applied Mathematics, Pukyong National University, Busan 608-737, Republic of Korea
2Department of Mathematics, Kyungsung University, Busan 608-736, Republic of Korea
3School of Mathematical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
4Department of Mathematics, University of Delhi, Delhi 110007, India

Received 21 September 2010; Revised 18 January 2011; Accepted 26 January 2011

Academic Editor: P. J. Y. Wong

Copyright © 2011 Nak Eun Cho et al. 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.

Abstract

Subordination and superordination preserving properties for multivalent functions in the open unit disk associated with the Dziok-Srivastava operator are derived. Sandwich-type theorems for these multivalent functions are also obtained.