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Sonīpat, India

Mehrok B.S.,643 E | Singh G.,Miri Piri Khalsa College | Gupta D.,Mm University
Tamkang Journal of Mathematics | Year: 2011

For reals A, B, C, D such that -1 ≤ D ≤ B < A ≤ C ≤ 1, a subclass Ks (A, B; C, D) of analytic functions f (z) = z + σ∞ k=2akzk in the open unit disc E = {z : |z| < 1} is introduced. The object of the present paper is to determine the coefficient estimate for functions f (z) belonging to the class Ks(A, B; C, D).

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