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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access October 21, 2015

Inequalities of harmonic univalent functions with connections of hypergeometric functions

  • Janusz Sokół , Rabha W. Ibrahim , M. Z. Ahmad and Hiba F. Al-Janaby
From the journal Open Mathematics


Let SH be the class of functions f = h+g that are harmonic univalent and sense-preserving in the open unit disk U = { z : |z| < 1} for which f (0) = f'(0)-1=0. In this paper, we introduce and study a subclass H( α, β) of the class SH and the subclass NH( α, β) with negative coefficients. We obtain basic results involving sufficient coefficient conditions for a function in the subclass H( α, β) and we show that these conditions are also necessary for negative coefficients, distortion bounds, extreme points, convolution and convex combinations. In this paper an attempt has also been made to discuss some results that uncover some of the connections of hypergeometric functions with a subclass of harmonic univalent functions.


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Received: 2015-4-1
Accepted: 2015-9-16
Published Online: 2015-10-21

©2015 Sokół et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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