Sharp bounds of Fekete-Szegő functional for quasi-subordination class
Sharp bounds of Fekete-Szegő functional for quasi-subordination class
Abstract In the present paper, we introduce a certain subclass 𝒦 q (λ, γ, h) of analytic functions by means of a quasi-subordination. Sharp bounds of the Fekete-Szegő functional for functions belonging to the class 𝒦 q (λ, γ, h) are obtained. The results presented in the paper give improved …