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Coefficient bounds for certain classes of analytic functions

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Juneja O., Ponnusamy S., Rajasekaran S.

Annales Polonici Mathematici

1995

tom 62

nr 3

231-244

We determine coefficient estimates for α-spiral functions of order ϱ with respect to N-symmetric points (|α| = π/2, 0 ≤ ϱ = 1$ and N is a positive integer). Sharp coefficient bounds are also obtained for functions of the form $f(z)^{-t}$, where t is a positive integer and f(z) is an α-spiral function of order ϱ. Using this we deduce coefficient estimates for inverses of univalent α-spiral and meromorphic univalent α-spiral functions with vanishing early coefficients.

Ograniczanie wyników

1 Annales Polonici Mathematici

1 Juneja O.

1 Ponnusamy S.

1 Rajasekaran S.

1 1995

Wyniki wyszukiwania

Coefficient bounds for certain classes of analytic functions