Bulletin of the
Korean Mathematical Society
BKMS

ISSN(Print) 1015-8634 ISSN(Online) 2234-3016

Article

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Bull. Korean Math. Soc. 2004; 41(1): 53-71

Printed March 1, 2004

Copyright © The Korean Mathematical Society.

On a subclass of certain starlike functions with negative coefficients

Muhammet Kamali and Halit Orhan

Ataturk Universitesi, Ataturk Universitesi

Abstract

A certain subclass $T_{\Omega }(n,p,\lambda ,\alpha )$of starlike functions in the unit disk is introduced. The object of the present paper is to derive several interesting properties of functions belonging to the class $T_{\Omega }(n,p,\lambda ,\alpha ).$ Coefficient inequalities, distortion theorems and closure theorems of functions belonging to the class $T_{\Omega }(n,p,\lambda ,\alpha )$ are determined. Also we obtain radii of convexity for the class $T_{\Omega }(n,p,\lambda ,\alpha ).$ Furthermore, integral operators and modified Hadamard products of several functions belonging to the class $T_{\Omega }(n,p,\lambda ,\alpha )$ are studied here.

Keywords: Starlike functions, Hadamard product, Radii of convexity, Salagean operator, p-valent

MSC numbers: Primary 30C45