Toplam kayıt 2, listelenen: 1-2

    • Coefficient estimates for bi-concave functions 

      Sakar, F. Müge; Güney, H. Özlem (Ankara Üniversitesi, 2019-02-01)
      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 ...
    • Quasi-subordination and coefficient bounds for certain classes of meromorphic functions of complex order 

      Zayed, H. M.; Bulut, Serap; Mostafa, A. O. (Ankara Üniversitesi Fen Fakültesi, 2019-02-01)
      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. ...