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Dergiler / Communications Faculty of Sciences University of Ankara Series A1: Mathematics and Statistics / 2019 / Cilt: 68 - Sayı: 1

QUASI-SUBORDINATION AND COEFFICIENT BOUNDS FOR CERTAIN CLASSES OF MEROMORPHIC FUNCTIONS OF COMPLEX ORDER

A. O. Mostafa, Serap Bulut, H. M. Zayed

Sayfa
1197–1205
DOI
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Abstract

In this paper, we obtain Fekete-Szegˆ functional a1 a2 0 for functions of the classes q (') and q;;b(g; ') using quasi-subordination. Sharp bounds for the Fekete-Szegˆ functional a1 a2 0 are obtained. Also, applications of the main results for subclasses of functions deÖned by Bessel function are also considere.