... distribution, and reproduction inany medium, provided the original work is properly cited.1. IntroductionLet U {z ∈ C, |z| < 1} be the open unit disk and let A denote the class of the functions ... inequal-ityRezfzfz<β, z∈ U,β>1, 1.2and let Nβ be the subclass of A, consisting of functions fz, which satisfy the inequalityRezfzfz 1<β, z∈ U. 1.3These classes ... Then the integral operator Fzz0ft/tαdt∈Nδ with δ αβ − 11 and α>0.Proof. In Corollary 2.2, we consider n 1andα1 α.Corollary 2.4. Let f ∈Mβ with β>1. Then the...