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    Coefficient estimates for a certain class of analytic and bi-univalent functions defined by fractional derivative
    (Elsevier France-Editions Scientifiques Medicales Elsevier, 2014) Akin, Gulfem; Eker, Sevtap Sumer
    We introduce and investigate a subclass of analytic and bi-univalent functions defined by a fractional derivative operator in the open unit disk. Using the Faber polynomial expansions, we obtain upper bounds for the coefficients of functions belonging to this class. (C) 2014 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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    Geometric Properties of the Generalized Wright-Bessel Functions
    (Univ Craiova, 2023) Akin, Gulfem; Eker, Sevtap Sumer
    In this article, we studied the geometric properties of generalized Wright-Bessel functions. For this purpose, we determined sufficient conditions for univalency, convexity, starlikeness and close-to-convexity of the generalized Wright-Bessel functions in the open unit disk.