Hankel Determinant for Certain Subclasses of Analytic Function
Hamzat Jamiu Olusegun *
Department of Pure and Applied Mathematics, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria.
Oni Abiola Ayobami
Department of Pure and Applied Mathematics, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Let S denote the class of analytic functions normalized and univalent in the open unit disk.
U ={ Z : |Z|<1 }The prime focus of the present paper is to obtain sharp upper bounds for the functional 
for functions belonging to the class 
.
Keywords: Univalent, analytic, starlike, second Hankel determinant.