International Journal of Mathematics and Mathematical Sciences 
Volume 2006 (2006), Article ID 38258, 6 pages
doi:10.1155/IJMMS/2006/38258

Neighborhoods of certain classes of analytic functions with negative coefficients

M. K. Aouf

 Department of Mathematics, Faculty of Science, University of Mansoura, Mansoura 35516, Egypt
Received 26 September 2005; Revised 14 March 2006; Accepted 25 April 2006

Abstract

By making use of the familiar concept of neighborhoods of analytic functions, the author proves several inclusion relations associated with the (n,δ)-neighborhoods of various subclasses defined by Salagean operator. Special cases of some of these inclusion relations are shown to yield known results.