Coefficient Conditions for Starlikeness of Nonnegative Order

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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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Bibliographic Details
Main Authors:	M. Ali, Rosihan, See, Keong Lee, R. Mondal, Saiful
Format:	Article
Language:	English
Published:	Hindawi Publishing Corporation 2012
Subjects:	QA1-939 Mathematics
Online Access:	http://eprints.usm.my/38458/ http://eprints.usm.my/38458/1/Coefficient_Conditions_for_Starlikeness_of_Nonnegative_Order.pdf

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