Upper bound of second Hankel determinant of subclass of bi-univalent functions defined by subordination
Abstract
In this paper, new class of bi-univalent functions are introduced. Upper bound of the second Hankel determinant |H2(2)| of subclass of bi-univalant functions class , which defined by subordination, investigated. Furthermore, some results concluded as a special case of our main results and corrected some previous researchers results which investigated by miscalculation.
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