- Communications Faculty of Sciences University Ankara Series A1 Mathematics and Statistics
- Vol: 68 Issue: 1
- Coefficient estimates for bi-concave functions
Coefficient estimates for bi-concave functions
Authors : F. Müge Sakar, H. Özlem Güney
Pages : 53-60
Doi:10.31801/cfsuasmas.443600
View : 9 | Download : 15
Publication Date : 2019-02-01
Article Type : Research
Abstract :In this study,a new class C_{Σ}^{p,q}(α) of analytic and bi-concave functions were presented in the open unit disc. The coefficients estimates on the first two Taylor-Maclaurin coefficients |a₂| and |a₃| were found for functions belonging to this class.Keywords : Analytic, bi-concave functions, analytic function, univalent function, bi-univalent function, concave function