Journals / Hacettepe Journal of Mathematics and Statistics / 2021 / Cilt: 50 - Sayı: 3

Some special families of holomorphic and Sălăgean type bi-univalent functions associated with Horadam polynomials involving a modified sigmoid activation function

Pages
710–720
Publication Date
2022-10-18
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

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.

🔖

Cite This Article

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

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (16)

  1. A.G. Alamoush, Coefficient estimates for certain subclass of bi-univalent functions associated the Horadam polynomials, arXiv: 1812.10589v1 [math.CV]
  2. 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
  3. 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
  4. 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
  5. 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
  6. P.L. Duren, Univalent Functions, Grundlehren der Mathematischen Wissenschaften, Band 259. Springer-Verlag, New York, 1983
  7. 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
  8. M. Fekete and G. Szegö, Eine Bemerkung Über Ungerade Schlichte Funktionen, J. Lond. Math. Soc. 89, 85–89, 1933
  9. 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
  10. P. Filipponi and A.F. Horadam, Second derivative sequence of Fibonacci and Lucas polynomials, Fibonacci Quart. 31, 194–204, 1993
  11. A.F. Horadam and J.M. Mahon, Pell and Pell - Lucas polynomials, Fibonacci Quart. 23, 7–20, 1985
  12. T. Hörzum and E. Gökçen Koçer, On some properties of Horadam polynomials, Int. Math. Forum. 4, 1243–1252, 2009
  13. M. Lewin, On a coefficient problem for bi-univalent functions, Proc. Amer. Math. Soc. 18, 63–68, 1967
  14. G.S. Sălăgean, Subclasses of Univalent Functions, Lecture notes in Mathematics 1013, 362–372, Springer, Berlin, 1983
  15. 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
  16. H.M. Srivastava, A.K. Mishra and P. Gochhayat, Certain subclasses of analytic and