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Radius Constants for Analytic Functions with Fixed Second Coefficient
Let f(z) = z + ∑(n=2) (∞) a (n) z (n) be analytic in the unit disk with the second coefficient a (2) satisfying |a (2) | = 2b, 0 ≤ b ≤ 1. Sharp radius of Janowski starlikeness is obtained for functions f whose nth coefficient satisfies |a (n) | ≤ cn + d (c, d ≥ 0) or |a (n) | ≤ c/n (c > 0 and ...
| Autores principales: | , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
Hindawi Publishing Corporation
2014
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4102033/ https://www.ncbi.nlm.nih.gov/pubmed/25101327 http://dx.doi.org/10.1155/2014/898614 |