Sharp Bounds for the Second Hankel Determinant of Logarithmic Coefficients for Strongly Starlike and Strongly Convex Functions

The logarithmic coefficients are very essential in the problems of univalent functions theory. importance is due to fact that bounds on f can transfer Taylor themselves or their powers, via Lebedev–Milin inequalities; therefore, it interesting investigate Hankel determinant whose entries coefficients. main purpose this paper obtain sharp for second strongly starlike and convex functions.