Open Access

Double Subordination-Preserving Properties for Certain Integral Operators

Journal of Inequalities and Applications20072007:083073

DOI: 10.1155/2007/83073

Received: 27 November 2006

Accepted: 4 January 2007

Published: 11 February 2007

Abstract

The purpose of the present paper is to obtain the sandwich-type theorem which contains the subordination- and superordination-preserving properties for certain integral operators defined on the space of normalized analytic functions in the open unit disk.

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Authors’ Affiliations

(1)
Department of Applied Mathematics, Pukyong National University
(2)
Department of Mathematics, Kinki University

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Copyright

© N. E. Cho and S. Owa 2007

This article is published under license to BioMed Central Ltd. 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.