Coefficient Estimates And Fekete-Szegӧ Inequalities For New Subclasses Of Bi-Univalent Functions Defined By Convolution Operator

This study presents a new convolution operator constructed through the Hadamard product of the Komatu integral operator with the Opoola differential operator.By applying quasi-subordination, two new subclasses of bi-univalent functions are defined in the open unit disk 𝑈.For these subclasses, estimates are obtained for the coefficients |𝒹 𝟸 | and |𝒹 3 |.In addition, the Fekete-Szegӧ inequalities are established for the introduced subclasses.Several known results are recovered as special cases by suitable choices of the involved parameters.