A unified approach for univalent functions with negative coefficients using the Hadamard product

• Date: 1997
• Main Authors: Assiri, E. Q., Mogra, M. L., Ассірі, Є. В., Могра, М. Л.
• Format: Article
• Language: English
• Published: Institute of Mathematics, NAS of Ukraine 1997
• Online Access: https://umj.imath.kiev.ua/index.php/umj/article/view/5113
• Journal Title: Ukrains’kyi Matematychnyi Zhurnal

For given analytic functions ϕ(z) = z + Σ n=2 ∞ λ n z n , Ψ(z) = z + Σ n=2 ∞ μ with λ n ≥ 0, μ n ≥ 0, and λ n ≥ μ n and for α, β (0≤α