Bounds for certain linear combinations of the Faber coefficients of functions analytic in an ellipse

Abstract

Let S? be a bounded, simply connected domain in C with 0 is an element of Omega and partial derivative Omega analytic. Let S(Omega) denote the class of functions F(z) which are analytic and univalent in Omega with F(0) = 0 and F'(0) = 1. Let {phi(n), (z)}(n=0)(infinity) be the Faber polynomials associated with Omega. If F(z) is an element of S(Omega), then F(z) can be expanded in a series of the form [GRAPHICS] in terms of the Faber polynomials. Let where r > 1. In this paper, we obtain sharp bounds for certain linear combinations of the Faber coefficients of functions F(z) in S(E(r)) and in certain related classes.