Upper bound of the third Hankel determinant for a class of analytic functions related with lemniscate of Bernoulli

摘要

In this paper, the upper bound of the Hankel determinant H 3 ( 1 ) for a subclass of analytic functions associated with right half of the lemniscate of Bernoulli ( x 2 + y 2 ) 2 ? 2 ( x 2 ? y 2 ) = 0 is investigated. MSC:30C45, 30C50.