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Korean Mathematical Society JKMS

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J. Korean Math. Soc. 1997; 34(2): 427-436

Printed June 1, 1997

Copyright © The Korean Mathematical Society.

Angular estimations of certain analytic functions

Nak Eun Cho and Ji A Kim

Pukyong National University and Pukyong National University

Abstract

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In the present paper, we investigate some argument properties of certain analytic functions and the integral preserving properties in a sector. Our results include several previous results as special cases.

Keywords: argument, starlike function, integral operator, close-to-covex function

MSC numbers: 30C45

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