Second Hankel Determinant of Bi-univalent Functions
DOI:
https://doi.org/10.11113/mjfas.v19n2.2807Keywords:
Analytic functions, Bi-univalent functions, Second Hankel determinant, SubordinationAbstract
Let be the class of functions which are analytic in the open unit disk and having the form . Denote to be the class for all functions in that are univalent in . Then, let denote the class of bi-univalent functions in . In this paper, we obtain the second Hankel determinant for certain classes of analytic bi-univalent function which are defined by subordinations in the open unit disk . In particular, we determine the initial coefficients and and obtained the upper bound for the functional of functions in the classes of analytic bi-univalent function which are defined by subordinations in .
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