Results on Coefficient Estimates For Subclasses of Analytic And Bi-Univalent functions

In this paper, we introduce and investigate two interesting subclasses R ∑ h , p ( τ , γ , δ ) and of g ∑ h , p ( μ , γ , λ ) analytic and bi-univalent functions in the unit disk U.For functions belonging to the classes R ∑ h , p ( τ , γ , δ ) and g ∑ h , p ( μ,   γ,   λ ) , we obtain estimates on the first two Taylor-Maclaurin coefficients |a 2 | and |a 3 |. Many relevant connections with known or new results are pointed out.