Coefficient Conditions for Starlikeness of Nonnegative Order
Sufficient conditions on a sequence {ak} of nonnegative numbers are obtained that ensures f(z)= E°°k=1 akzk is starlike of nonnegative order in the unit disk. A result of Vietoris on trigonometric sums is extended in this pursuit. Conditions for close to convexity and convexity in the direction of...
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Main Authors: | M. Ali, Rosihan, See, Keong Lee, R. Mondal, Saiful |
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格式: | Article |
语言: | English |
出版: |
Hindawi Publishing Corporation
2012
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在线阅读: | http://eprints.usm.my/38458/1/Coefficient_Conditions_for_Starlikeness_of_Nonnegative_Order.pdf http://eprints.usm.my/38458/ https://doi.org/10.1155/2012/450318 |
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