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Coefficients estimates for functions in $$B_n (\alpha)$$. (English) Zbl 1035.30005
Summary: We consider functions $$f$$, analytic in the unit disc and of the normalised form $$f(z) = z + \sum_{k=2}^\infty a_k z^k$$ . For functions $$f \in B_n (\alpha)$$, the class of functions involving the Sălăgean differential operator, we give some coefficient estimates, namely, $$| a_2|$$, $$| a_3|$$, and $$| a_4|$$.
##### MSC:
 30C45 Special classes of univalent and multivalent functions of one complex variable (starlike, convex, bounded rotation, etc.)
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