Hankel Determinant for Starlike and Convex Functions of Order Α/2

Abstract

The aim of this paper is to obtain an upper bound to the second Hankel determinant a 2 a 4 − a 2 3 for starlike and convex functions of order α 2 − 1 (1 ≤ α ≤ 2).2000 Mathematics Subject Classification. 30C45.