Upper Bound of the Third Hankel Determinant for a Subclass of Analytic Functions Subordinate to Cosine Function
Abstract
In this paper, we define a new subclass of analytic functions involving the cosine functions. For this function class, we obtain the upper bound of the third Hankel determinant.
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DOI: http://dx.doi.org/10.21015/vtm.v8i1.392
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