Coefficient Estimates for Initial Taylor-Maclaurin Coefficients for a Subclass of Analytic and Bi-Univalent Functions Defined by Al-Oboudi Differential Operator


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Bulut S.

SCIENTIFIC WORLD JOURNAL, 2013 (SCI İndekslerine Giren Dergi) identifier identifier identifier

Özet

We introduce and investigate an interesting subclass N P-Sigma(lambda,delta)(n, beta; h) of analytic and bi-univalent functions in the open unit disk U. For functions belonging to the class N P-Sigma(lambda,delta)(n,beta; h), we obtain estimates on the first two Taylor-Maclaurin coefficients vertical bar a(2)vertical bar and vertical bar a(3)vertical bar.