Document Type : Research Paper

Authors

Department of Mathematics, Kamı̇l Özdağ Science Faculty, Karamanoğlu Mehmetbey University, Karaman, Türkı̇ye.

Abstract

This article deals with two new subclasses of analytic and bi-univalent functions in the open unit disk, which is defined  by applying subordination principle between analytic functions and the generalized Bivariate Fibonacci polynomials. Bounds for coefficients $\left|a_{2}\right|$ and $\left|a_{3}\right|$ of functions in these subclasses are estimated in terms of generalized Bivariate Fibonacci polynomials. In addition, the Fekete-Szeg\"{o} problem is handled for the members of these subclasses and several consequences and examples of the main results are presented. The results of article generalize some of the previously published papers in the literature. 

Keywords

Main Subjects

1. İ. Aktaş and N. Yılmaz, Initial coefficients estimate and Fekete-Szegö problems for two new subclasses of bi-univalent functions, Konuralp J. Math., 10(1) (2022), pp. 138-148.
2. I. Aldawish, T. Al-Hawary and B.A. Frasin, Subclasses of biunivalent functions defined by Frasin differential operator, Mathematics, 8(2020), 783.
3. H. Aldweby and M. Darus, On a subclass of bi-univalent functions associated with the q-derivative operator, J. Math. Computer Sci., 19 (2019), pp. 58-64.
4. R.M. Ali, S.K. Lee, V. Ravichandran and S. Supramaniam, Coefficient estimates for bi-univalent Ma-Minda starlike and convex functions, Appl. Math. Lett., 25 (2012), pp. 344-351.
5. Ş. Altınkaya and S. Yalçın, On the Chebyshev polynomial coefficient problem of bi-Bazilevič function, TWMS J. App. Eng. Math., 10 (2020), pp. 251-258.
6. Ş. Altınkaya and S. Yalçın, On the $\left( p,q\right)-$Lucas polynomial coefficient bounds of the bi-univalent function class $\sigma $, Bol. Soc. Mat. Mex., 25 (2019), pp. 567-575.
7. E. Amini, S. Al-Omari, K. Nonlaopon and D. Balenau, Estimates for coefficients of bi-univalent functions associated with a fractional q-difference operator, 2022(14) (2022), 879.
8. A. Amourah, Fekete-Szegö inequality for analytic and bi-univalent functions subordinate to $\left( p,q\right)-$Lucas polynomials, TWMS J. App. and Eng. Math., 11 (2021), pp. 959-965.
9. A. Amourah, Initial bounds for analytic and bi-univalent functions by means of (p, q)−Chebyshev polynomials defined by differential operator, General Letters in Mathematics, 7 (2019), pp. 45-51.
10. A. Amourah, B.A. Frasin, G. Murugusundaramoorthy and T. Al- Hawary, Bi-Bazilevič functions of order ν+iδ associated with $\left( p,q\right)-$Lucas polynomials, AIMS Math., 6 (2021), pp. 4296-4305.
11. M. Bicknell, Introduction to Fibonacci polynomials and their divisibility properties, Fibonacci Quart., 8 (1970), pp. 407-420.
12. L. Bieberbach, Uber die Koeffizienten derjenigen Potenzreihen, welche eine schlichte Abbildung des Einheitskreises vermitteln, Sitzungsberichte Preussische Akademie der Wissenschaften, 138 (1916), pp. 940-55.
13. S. Bulut, N. Magesh and V.K. Balaji, Initial bounds for analytic and bi-univalent functions by means of Chebyshev polynomials, J. Class. Anal., 11 (1) (2017), pp. 83-89.
14. D. Brannan and J. Clunie, Aspects of contemporary complex analysis, Academic Press, New York, 1980.
15. D. Brannan and T.S. Taha, On some classes of bi-univalent functions, in: Proceedings of the International Conference on Mathematical Analysis and its Applications. Math. Anal. Appl., 1988, pp. 53-60.
16. M. Çağlar, Chebyshev polynomial coefficient bounds for a subclass of bi-univalent functions, C. R. Acad. Bulgare Sci., 72 (2019), pp. 1608-1615.
17. M. Çağlar, G. Palpandy and E. Deniz, Unpredictability of initial coefficient bounds for m-fold symmetric bi-univalent starlike and convex functions defined by subordinations, Afr. Mat., 29 (2018), pp.793-802.
18. M. Çağlar, H. Orhan and N. Yağmur, Coefficient bounds for new subclasses of bi-univalent functions, Filomat, 27 (2013), pp. 1165-1171.
19. L. De Branges, A proof of the Bieberbach conjecture, Acta Mathematica, 154 (1-2) (1985), pp. 137-152.
20. E. Deniz, Certain subclasses of bi-univalent functions satisfying subordinate conditions, J. Classical Anal., 2 (1) (2013), pp. 49-60.
21. E. Deniz, M. Kamali, and S. Korkmaz, A certain subclass of biunivalent functions associated with Bell numbers and q-Srivastava Attiya operator, AIMS Mathematics, 5 (6) (2020), pp. 7259-7271.
22. P.L. Duren, Univalent Functions, in: Grundlehren der Mathematischen Wissenschaften, Band 259, New York, Berlin, Heidelberg and Tokyo, Springer-Verlag, 1983,
23. M. Fekete and G. Szegö, Eine bemerkung über ungerade schlichte funktionen, J. Lond. Math. Soc., 1 (2) (1933), pp. 85-89.
24. B.A. Frasin, A new differential operator of analytic functions involving binomial series, Bol. Soc. Paran. Mat., 38 (2020), pp. 205-213
25. B.A. Frasin and T. Al-Hawary, Initial Maclaurin coefficients bounds for new subclasses of bi-univalent functions, Theory Appl. Math. Comp. Sci., 5 (2015), pp. 186-193.
26. B.A. Frasin and M.K. Aouf, New subclasses of bi-univalent functions, Appl. Math. Lett., 24 (2011), pp. 1569-1573.
27. B.A. Frasin, S.R. Swamy and I. Aldawish, A comprehensive family of bi-univalent functions defined by k-Fibonacci numbers, J. Funct. Spaces, 2021 (2021), Article ID 4249509, 7 pages.
28. B.A. Frasin, S.R. Swamy and J. Nirmala, Some special families of holomorphic and Al-Oboudi type bi-univalent functions related to k-Fibonacci numbers involving modified Sigmoid activation function, Afr. Mat., 32 (2021), pp. 631-643.
29. P.R. Garabedian and M.Schiffer, A proof of the Bieberbach conjecture for the fourth coefficient, J. Ration. Mech. Anal., 4 (1955), pp. 427-465.
30. H.Ö. Güney, G. Murugusundaramoorthy and J. Sokoł, Subclasses of bi-univalent functions related to shell-like curves connected with Fibonacci numbers, Acta Univ. Sapientiae Math., 10 (2018), pp. 70-84.
31. H.Ö. Güney, G. Murugusundaramoorthy and J. Sokoł, Certain subclasses of bi-univalent functions related to k-Fibonacci numbers, Commun. Fac. Sci. Univ. Ank. Ser. A1. Math. Stat., 68 (2019), pp. 1909-1921.
32. Y.E. Hohlov, Operators and operations on the class of univalent functions, Izv. Vyssh. Uchebn. Zaved. Mat., 10 (1978), pp. 83-89.
33. Q. Hu, T.G. Shaba, J. Younis, B. Khan, W.K. Mashwani and M. Çaǧlar, Applications of q-derivative operator to subclasses of biunivalent functions involving Gegenbauer polynomials, Appl. Math. Sci. Eng., 30 (1) (2022), pp. 501-520.
34. K.A. Jassim, R.O. Rasheed and R.H. Jassim, Generalized subclass of analytic bi-univalent functions defined by differential operator, J. Interdiscip. Math., 24 (4) (2021), pp. 961-970.
35. S. Kazımoğlu and E. Deniz, Fekete-Szegö problem for generalized bi-subordinate functions of complex order, Hacet. J. Math. Stat., 49 (5) (2020), pp. 1695-1705.
36. E.G. Kocer and S. Tuncez, Bivariate Fibonacci and Lucas Like Polynomials, Gazi University Journal of Science, 29 (2016), pp. 109-113.
37. T. Koshy, Fibonacci and Lucas Numbers with Applications, John Wiley and Sons Inc. NewYork, 2001.
38. M. Lewin, On a coefficient problem for bi-univalent functions, Proc. Amer. Math. Soc., 18 (1967), pp. 63-68.
39. K. Lowner, Untersuchungen tiber schlichte konforme Abbildungen des Einheitskreises, Math. Ann., 89 (1923), pp. 102-121.
40. S.S. Miller and P.T. Mocanu, Differential Subordinations, Monographs and Textbooks in Pure and Applied Mathematics, Marcel Dekker, Inc., New York 2000.
41. Z. Nehari, Conformal Mapping, McGraw-Hill, NewYork, USA, 1952.
42. E. Netenyahu, The minimal distance of the image boundary from the origin and the second coefficient of a univalent function in $\left|z\right|<1$, Arch. Ration. Mech. Anal., 32 (1969), pp. 100–112.
43. K.I. Noor and M.A. Noor, On integral operators, J. Math. Anal. Appl., 238 (1999), pp. 341-352.
44. H. Orhan, İ. Aktaş and H. Arıkan, On new subclasses of biunivalent functions associated with the $(p,q)$-Lucas polynomials and bi-Bazilevic̆type functions of order $\rho+\xi$, Turk. J. Math., 47(1) (2023), pp. 98-109.
45. M. Ozawa, An elementary proof of the Bieberbach conjecture for the sixth coefficient, Kodai Math. Sem. Rep., 21(2) (1969), pp. 129-132.
46. Á.O. Páll-Szabó and G.I. Oros, Coefficient related studies for new classes of bi-univalent functions, Mathematics, 2020 (8) (2020), 1110.
47. R.N. Pederson, A proof of the Bieberbach conjecture for the sixth coefficient, Arch. Rational Mech. Anal., 31 (1968), pp. 331-351.
48. R. Pederson and M. Schiffer, A proof of the Bieberbach conjecture for the fifth coefficient, Archive for Rational Mechanics and Analysis, 45 (1972), pp. 161-193.
49. C. Pommerenke, Univalent functions, Vandenhoeck & Ruprecht, Göttingen, Germany, 1975.
50. G.S. Salagean, Subclasses of univalent functions, in: Complex Analysis-Fifth Romanian-Finnish Seminar, Lecture Notes in Mathematics, vol 1013. Springer, Berlin, Heidelberg, 1983.
51. G. Singh, G. Singh and G. Singh, A subclass of bi-univalent functions defined by generalized Sãlãgean operator related to shell-like curves connected with Fibonacci numbers, Int. J. Math. Math. Sci., 2019 (2019), Article ID 7628083, 7 pages.
52. 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 (2019), pp. 1873-1879.
53. H.M. Srivastava, S. Bulut, M. Çağlar and N. Yağmur, Coefficient estimates for a general subclass of analytic and bi-univalent functions, Filomat, 27 (2013), pp. 831-842.
54. H.M. Srivastava, A.K. Mishra and P. Gochhayat, Certain subclasses of analytic and bi-univalent functions, Appl. Math. Lett., 23 (2010), pp. 1188-1192.
55. H.M. Srivastava, G. Murugusundaramoorthy and T. Bulboacă, The second Hankel determinant for subclasses of bi-univalent functions associated with a nephroid domain, Rev. Real Acad. Cienc. Exactas Fis. Nat. Ser. A-Mat., 116 (2022), 145.
56. H.M. Srivastava, G. Murugusundaramoorthy and K. Vijaya, Coefficient estimates for some families of bi-Bazilevič functions of the Ma-Minda type involving the Hohlov operator, J. Class. Anal., 2 (2013), pp. 167-181.
57. H.M. Srivastava, A. Motamednezhad and E.A. Adegani, Faber polynomial coefficient estimates for bi-univalent functions defined by using differential subordination and a certain fractional derivative operator, Mathematics, 2020 (8) (2020), 172.
58. H.M. Srivastava, A.K. Wanas and G. Murugusundaramoorthy, A certain family of bi-univalent functions associated with the Pascal distribution series based upon the Horadam polynomials, Surv. Math. Appl., 16 (2021), pp. 193-205.
59. H.M. Srivastava, A.K. Wanas and R. Srivastava, Applications of the q-Srivastava-Atiyya operator involving a certain family of biunivalent functions associated with the Horadam polynomials, Symmetry, 2021 (13) (2021), 1230.
60. N. Yılmaz and İ. Aktaş, On some new subclasses of bi-univalent functions defined by generalized Bivariate Fibonacci polynomial, Afr. Mat. 33 (2022), 59.