Some extensions of coefficient problems for bi-univalent Ma-Minda starlike and convex functions
Open Access
- 1 January 2015
- journal article
- Published by National Library of Serbia in Filomat
- Vol. 29 (7) , 1645-1650
Abstract
Motivated by the works of H.M. Srivastava et al. [7], we introduce and investigate two new general subclasses HT (φ,ψ,α), h,pHT (α) of bi-starlike and bi-convex of Ma-Minda type functions. Bounds on the first two coefficients |a2| and |a3| for functions in HT (φ,ψ,α), h,pHT (α) are given. The results here generalize and improve the corresponding earlier works done by Ali et al.[1] and Brannan et al.[2].Keywords
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