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In this paper, the upper bound of the Hankel determinant H3(1)Open image in new window for a subclass of analytic functions associated with right half of the lemniscate of Bernoulli (x2+y2)2−2(x2−y2)=0Open image in new window is investigated.

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