Coefficient estimates for Ruscheweyh derivatives

Maslina Darus and Ajab Akbarally

International Journal of Mathematics and Mathematical Sciences, 2004, vol. 2004, 1-6

Abstract:

We consider functions f , analytic in the unit disc and of the normalized form f ( z ) = z + ∑ n = 2 ∞ a n z n . For functions f ∈ R ¯ δ ( β ) , the class of functions involving the Ruscheweyh derivatives operator, we give sharp upper bounds for the Fekete-Szegö functional | a 3 − μ a 2 2 | .

Date: 2004
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jijmms:961602

DOI: 10.1155/S0161171204309051

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