Certain subclasses of λ-pseudo bi-univalent functions with respect to symmetric points associated with the Gegenbauer polynomial.

In this article, we introduce and investigate two new subclasses of λ -pseudo bi-univalent functions with respect to symmetric points in the open unit disk U defined by means of Gegenbauer polynomial. Coefficient bounds and Fekete–Szegö inequalities for functions belong to these subclasses are obtained. Furthermore, several new special cases upon specializing the parameters involved of our results are pointed out which are new and not discussed sofar. [ABSTRACT FROM AUTHOR]