Cilt:68 Sayı:01 (2019)

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https://dspace.ankara.edu.tr/handle/20.500.12575/75721

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Browsing Cilt:68 Sayı:01 (2019) by Subject "Analytic"

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    Coefficient estimates for bi-concave functions
    (Ankara Üniversitesi, 2019-02-01) Sakar, F. Müge; Güney, H. Özlem; Other; Other
    In this study,a new class C_{Σ}^{p,q}(α) of analytic and bi-concave functions were presented in the open unit disc. The coefficients estimates on the first two Taylor-Maclaurin coefficients |a₂| and |a₃| were found for functions belonging to this class.
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    Quasi-subordination and coefficient bounds for certain classes of meromorphic functions of complex order
    (Ankara Üniversitesi Fen Fakültesi, 2019-02-01) Zayed, H. M.; Bulut, Serap; Mostafa, A. O.; Other; Other
    In this paper, we obtain Fekete-Szegö functional |a₁-μa₀²| for functions of the classes Σ_{q}^{∗}(ϕ) and Σ_{q,λ,b}^{∗}(g,ϕ) using quasi-subordination. Sharp bounds for the Fekete-Szegö functional |a₁-μa₀²| are obtained. Also, applications of the main results for subclasses of functions defined by Bessel function are also considered.