Second Hankel Determinant for certain class of bi-univalent functions defined by Chebyshev polynomials

摘要

Making use of Chebyshev polynomials, we obtain upper bound estimate for thesecond Hankel determinant of a subclass $\mathcal{N}_{\sigma }^{\mu}\left(\lambda ,t\right) $ of bi-univalent function class $\sigma.$