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: | , , |
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| 格式: | Article |
| 語言: | English |
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Hindawi Publishing Corporation
2012
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| 在線閱讀: | 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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