B. Venkateswarlu, P. Thirupathi Reddy, Chao Meng, G. Swapna
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On a certain subclass of analytic functions defined by a differential operator
In this work, we introduce and investigate a new class k−U˜Ssm(λ,γ,t) of analytic functions in the open unit disc U with negative coefficients. The object of the present paper is to determine coefficient estimates, neighborhoods and partial sums for functions f belonging to this class.