Altınkaya, ŞahseneYalçın, Sibel2024-10-022024-10-022017-12-012423-3900https://hdl.handle.net/11452/45659In this work, we obtain the Fekete-Szego inequalities for the class P-Sigma (lambda, phi) of bi-univalent functions. The results presented in this paper improve the recent work of Prema and Keerthi [11].eninfo:eu-repo/semantics/closedAccessSubclassBi-univalent functionsConvex functions with respect to symmetric pointsSubordinationFekete-szego inequalityScience & technologyPhysical sciencesMathematicsArticle0004103183000011751