Estimates of Fekete-Szeg¨o Functional of a Sub class of Analytic and Bi-Univalent Functions by Means of Chebyshev Polynomials

Abstract

In this work, a new subclass CΦ(γ, σ, n, t) of analytic and bi-univalent functions is defined by subordination principle and investigated. The initial coefficient bounds and the upper estimates of the Fekete-Szeg¨o functional were obtained using Chebyshev polynomials.