Initial bounds for analytic and bi-univalent functions by means of (p,q)−Chebyshev polynomials defined by differential operator

Ala Amourah

In this paper, a subclassT ζ Σ (m,γ,λ,p,q) of analytic and bi-univalent functions by means of (p,q)−Chebyshev polynomials is introduced. Certain coefficient bounds for functions belong to this subclass are obtained. In addition, the Fekete-Szeg¨ o problem is solved in ...