Some special families of holomorphic and Sălăgean type bi-univalent functions associated with Horadam polynomials involving a modified sigmoid activation function
Some interesting consequences of the results established here are also indicated.
📌 3 Key Takeaways
🎯
Objective & Hypothesis:The aim of this paper is to introduce some special families of holomorphic and S\u{a}l\u{a}gean type bi-univalent functions by making use of Horadam polynomials involving the modified sigmoid activation function $\phi(s)=\frac{2}{1+e^{-s} },\,s\geq0$ in the open unit disc $\mathfrak{D}$.
📊
Key Findings & Data:We investigate the upper bounds on initial coefficients for functions of the form $g_{\phi}(z)=z+\sum\limits_{j=2}^{\infty}\phi(s)d_jz^j$, in these newly introduced special families and also discuss the Fekete-Szegö problem.
💡
Conclusion & Impact:Some interesting consequences of the results established here are also indicated.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Holomorphic function · Bi-univalent function · Fekete - Szegö inequality
Abstract
The aim of this paper is to introduce some special families of holomorphic and S\u{a}l\u{a}gean type bi-univalent functions by making use of Horadam polynomials involving the modified sigmoid activation function $\phi(s)=\frac{2}{1+e^{-s} },\,s\geq0$ in the open unit disc $\mathfrak{D}$. We investigate the upper bounds on initial coefficients for functions of the form $g_{\phi}(z)=z+\sum\limits_{j=2}^{\infty}\phi(s)d_jz^j$, in these newly introduced special families and also discuss the Fekete-Szegö problem. Some interesting consequences of the results established here are also indicated.
SWAMY, S. R., BULUT, S., SAILAJA, Y. (2022). Some special families of holomorphic and Sălăgean type bi-univalent functions associated with Horadam polynomials involving a modified sigmoid activation function. Hacettepe Journal of Mathematics and Statistics, Cilt: 50 - Sayı: 3, 710–720. https://ajindex.com/articles/529969
A.G. Alamoush, Coefficient estimates for certain subclass of bi-univalent functions associated the Horadam polynomials, arXiv: 1812.10589v1 [math.CV]
A.G. Alamoush, Certain subclasses of bi-univalent functions involving the Poisson distribution associated with Haradam polynomials, Malaya J. Mat. 7 (4), 618–624, 2019
Ş. Altınkaya and S. Yalçın, On the Chebyshev polynomial coefficient problem of some subclasses of bi-univalent functions, Gulf J. Math. 5 (3), 34–40, 2017
D.A. Brannan and T.S. Taha, On some classes of bi-univalent functions, in: S. M. Mazhar, A. Hamoui, N.S. Faour (eds) Mathematical Analysis and its Applications, Kuwait, KFAS Proceedings Series 3, 53–60, 1985, Pergamon Press (Elsevier Science Limited), Oxford, 1988, see also Studia Univ. Babeş-Bolyai Math. 31 (2), 70–77, 1986
S. Bulut, Faber polynomial coefficient estimates for a comprehensive subclass of analytic bi-univalent functions, C R Acad. Sci. Paris Sér. I (352), 479–484, 2014
P.L. Duren, Univalent Functions, Grundlehren der Mathematischen Wissenschaften, Band 259. Springer-Verlag, New York, 1983
O.A. Fadipe-Joseph, B.B. Kadir, S.E. Akinwumi and E.O. Adeniran, Polynomial bounds for a class of univalent function involving sigmoid function, Khayyam J. Math. 4 (1), 88–101, 2018
M. Fekete and G. Szegö, Eine Bemerkung Über Ungerade Schlichte Funktionen, J. Lond. Math. Soc. 89, 85–89, 1933
P. Filipponi and A.F. Horadam, Derivative sequences of Fibonacci and Lucas polynomials, in: G. E. Bergum, A. N. Philippou, A. F. Horadam (eds) Applications of Fibonacci Numbers 4, 99-108, Springer, Dordrecht, 1991
P. Filipponi and A.F. Horadam, Second derivative sequence of Fibonacci and Lucas polynomials, Fibonacci Quart. 31, 194–204, 1993
A.F. Horadam and J.M. Mahon, Pell and Pell - Lucas polynomials, Fibonacci Quart. 23, 7–20, 1985
T. Hörzum and E. Gökçen Koçer, On some properties of Horadam polynomials, Int. Math. Forum. 4, 1243–1252, 2009
M. Lewin, On a coefficient problem for bi-univalent functions, Proc. Amer. Math. Soc. 18, 63–68, 1967
G.S. Sălăgean, Subclasses of Univalent Functions, Lecture notes in Mathematics 1013, 362–372, Springer, Berlin, 1983
H.M. Srivastava, Ş. Altınkaya and S. Yalçın, Certain Subclasses of bi-univalent functions associated with the Horadam polynomials, Iran J. Sci. Technol. Trans. Sci. 43, 1873–1879, 2019
H.M. Srivastava, A.K. Mishra and P. Gochhayat, Certain subclasses of analytic and