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Coefficient Estimates and Quasi-Subordination Properties Associated with Certain Subclasses of Analytic and Bi-Univalent Functions

  • S. P. Goyal EMAIL logo and Rakesh Kumar
Published/Copyright: July 29, 2015
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Abstract

In the present paper, we obtain the estimates on initial coefficients of normalized analytic function f in the open unit disk with f and its inverse g = f−1 satisfying the conditions that zf′(z)/f(z) and zg′(z)/g(z) are both quasi-subordinate to a univalent function whose range is symmetric with respect to the real axis. Several related classes of functions are also considered, and connections to earlier known results are established.

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Received: 2012-3-22
Accepted: 2012-10-4
Published Online: 2015-7-29
Published in Print: 2015-6-1

© Mathematical Institute Slovak Academy of Sciences

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