Simple proofs of certain results on generalized Fekete-Szegő functional in the class $\mathcal{S}$

Teodor Bulboacă, Milutin Obradović, Nikola Tuneski

In this paper we give simple proofs for the main results concerning generalized Fekete-Szegő functional of type $\left|a_3(f)-\lambda a_2(f{)}^2\right|-\mu |a_2(f)|$, where $λ\in\mathb…