Coefficient inequalities for a class of analytic functions associated with the lemniscate of Bernoulli

Abstract

In this paper, a new subclass of analytic functions ML_{\lambda}^{*} associated with the right half of the lemniscate of Bernoulli is introduced. The sharp upper bound for the Fekete-Szego functional |a_{3}-\mu a_{2}^{2}| for both real and complex \mu are considered. Further, the sharp upper bound to the second Hankel determinant |H_{2}(1)| for the function f in the class ML_{\lambda}^{*} using Toeplitz determinant is studied. Relevances of the main results are also briefly indicated.

Keywords

• Starlike function
• Fekete-Szego inequality
• Hankel determinant
• Lemniscate of Bernoulli