THIRD HANKEL DETERMINANT OF MULTIVALENT α - SPIRAL STARLIKE FUNCTIONS

Abstract

Hankel determinants, which arise from the Hankel matrix (a matrix with constant skew-diagonals), have several applications in engineering, particularly inareas involving signal processing, control theory, and system identification. In this paper, the upper bounds are obtained for the third Hankel determinant of a subclass of multivalent α-spiral starlike functions. It is observed that the bounds
obtained in this paper generalize some previous results available in literature