Estimates for a subclass of starlike functions involving a exponential function
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Abstract
In this paper, a new class of analytic function is defined by using an analytic characterization which is influenced by the multiplicative derivative. Multiplicative derivative is defined in a domain which excludes zero, so here the defined subclass did not involve swapping the ordinary derivative with a multiplicative derivative. But we have just used the motivation behind the purpose of such a restrictive calculus, given the circumstances that we have a more versatile calculus of Newton and Euler. Estimates involving the initial coefficients, inclusion and closure properties, which belong to the defined function class are our main results.
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References
[1] E. A. Adegani, N. E. Cho, and M. Jafari, Logarithmic coefficients for univalent functions defined by subordination, Mathematics 7 (5) (2019), 408. https://doi.org/10.3390/math7050408 Google Scholar
[2] E. A. Adegani, T. Bulboacă, N. H. Mohammed, and P. Zaprawa, Solution of logarithmic coefficients conjectures for some classes of convex functions, Mathematica Slovaca 73 (1) (2023), 79–88. https://doi.org/10.1515/ms-2023-0009 Google Scholar
[3] D. Alimohammadi, N. E. Cho, E. A. Adegani, and A. Motamednezhad, Argument and coefficient estimates for certain analytic functions, Mathematics 8 (1) (2020), 88. https://doi.org/10.3390/math8010088 Google Scholar
[4] D. Alimohammadi, E. A. Adegani, T. Bulboacă, and N. E. Cho, Logarithmic coefficients for classes related to convex functions, Bull. Malays. Math. Sci. Soc. 44 (2021), 2659–2673. https://doi.org/10.1007/s40840-021-01085-z Google Scholar
[5] S. Altinkaya and S. Yalçın, On some subclasses of M-fold symmetric bi-univalent functions, Commun. Fac. Sci. Univ. Ank. Sér. A1 Math. Stat. 67 (1) (2018), 29–36. https://doi.org/10.1501/Commua1_0000000827 Google Scholar
[6] J. H. Arango, D. Mejía, and S. Ruscheweyh, Exponentially convex univalent functions, Complex Variables Theory Appl. 33 (1-4) (1997), 33–50. https://doi.org/10.1080/17476939708815010 Google Scholar
[7] A. E. Bashirov, E. M. Kurpinar, and A. Özyapıcı, Multiplicative calculus and its applications, J. Math. Anal. Appl. 337 (1) (2008), 36–48. https://doi.org/10.1016/j.jmaa.2007.03.081 Google Scholar
[8] A. E. Bashirov, E. Mısırlı, Y. Tandogdu, and A. Özyapıcı, On modeling with multiplicative differential equations, Appl. Math. J. Chin. Univ. 26 (2011), 425–438. https://doi.org/10.1007/s11766-011-2767-6 Google Scholar
[9] A. E. Bashirov and M. Riza, On complex multiplicative differentiation, TWMS J. Appl. Eng. Math. 1 (1) (2011), 75–85. Google Scholar
[10] D. Breaz, K. R. Karthikeyan, and E. Umadevi, Non-Carathéodory analytic functions with respect to symmetric points, Math. Comput. Model. Dyn. Syst. 30 (1) (2024), 266–283. https://doi.org/10.1080/13873954.2024.2341691 Google Scholar
[11] D. Breaz, K. R. Karthikeyan, and G. Murugusundaramoorthy, Applications of Mittag–Leffler functions on a subclass of meromorphic functions influenced by the definition of a non-Newtonian derivative, Fractal Fract. 8 (2024), 509. https://doi.org/10.3390/fractalfract8090509 Google Scholar
[12] D. Breaz, K. R. Karthikeyan, D. Mohankumar, and A. Senguttuvan, Properties of a subclass of starlike functions involving the quantum derivative operator, MethodsX 15 (2025), 103740. https://doi.org/10.1016/j.mex.2025.103740 Google Scholar
[13] C. Carathéodory, Über den Variabilitätsbereich der Koeffizienten von Potenzreihen, Math. Ann. 64 (1) (1907), 95–115. https://doi.org/10.1007/BF01449883 Google Scholar
[14] I. Efraimidis, A generalization of Livingston’s coefficient inequalities for functions with positive real part, J. Math. Anal. Appl. 435 (1) (2016), 369–379. https://doi.org/10.1016/j.jmaa.2015.10.050 Google Scholar
[15] R. W. Ibrahim and M. Darus, Subordination inequalities of a new Salagean-difference operator, Int. J. Math. Comput. Sci. 14 (3) (2019), 573–582. https://future-in-tech.net/14.3/R-RabhaIbrahim.pdf Google Scholar
[16] R. W. Ibrahim, On a Janowski formula based on a generalized differential operator, Commun. Fac. Sci. Univ. Ank. Ser. A1 Math. Stat. 69 (2) (2020), 1320–1328. Google Scholar
[17] K. R. Karthikeyan and G. Murugusundaramoorthy, Properties of a class of analytic functions influenced by multiplicative calculus, Fractal Fract. 8 (3) (2024), 131. https://doi.org/10.3390/fractalfract8030131 Google Scholar
[18] Z. Lewandowski, S. S. Miller, and E. Zlotkiewicz, Gamma-starlike functions, Ann. Univ. Mariae Curie-Sklodowska Sect. A 28 (1974), 53–58. Google Scholar
[19] A. E. Livingston, The coefficients of multivalent close-to-convex functions, Proc. Amer. Math. Soc. 21 (1969), 545–552. https://doi.org/10.2307/2036417 Google Scholar
[20] W. C. Ma and D. Minda, A unified treatment of some special classes of univalent functions, Proc. Conf. Complex Analysis (Tianjin, 1992), Conf. Proc. Lecture Notes Anal., I, Int. Press, Cambridge, MA (1992), 157–169. Google Scholar
[21] I. M. Milin, Univalent functions and orthonormal systems, Nauka, Moscow (1971); English translation: American Mathematical Society, Providence (1977). Google Scholar
[22] C. Murat, K. R. Karthikeyan, and G. Murugusundaramoorthy, Inequalities on a class of analytic functions defined by generalized Mittag-Leffler function, Filomat 37 (19) (2023), 6277–6288. https://doi.org/10.2298/FIL2319277C Google Scholar
[23] C. Pommerenke, Univalent functions, Vandenhoeck & Ruprecht, Göttingen (1975). Google Scholar
[24] M. Riza, A. Özyapici, and E. Mısırlı, Multiplicative finite difference methods, Quart. Appl. Math. 67 (4) (2009), 745–754. https://doi.org/10.1090/S0033-569X-09-01158-2 Google Scholar
[25] H. M. Srivastava, A survey of some recent developments on higher transcendental functions of analytic number theory and applied mathematics, Symmetry 13 (2021), 2294. https://doi.org/10.3390/sym13122294 Google Scholar
[26] H. M. Srivastava, An introductory overview of fractional-calculus operators based upon the Fox Wright and related higher transcendental functions, J. Adv. Engrg. Comput. 5 (3) (2021), 135–166. http://dx.doi.org/10.55579/jaec.202153.340 Google Scholar
[27] H. M. Srivastava, Some parametric and argument variations of the operators of fractional calculus and related special functions and integral transformations, J. Nonlinear Convex Anal. 22 (8) (2021), 1501–1520. Google Scholar
[28] H. M. Srivastava, A. Kumar, S. Das, and K. Mehrez, Geometric properties of a certain class of Mittag–Leffler-type functions, Fractal Fract. 6 (2022), 54. https://doi.org/10.3390/fractalfract6020054 Google Scholar
[29] H. M. Srivastava, A. Fernandez, and D. Baleanu, Some new fractional-calculus connections between Mittag–Leffler functions, Mathematics 7 (2019), 485. https://doi.org/10.3390/math7060485 Google Scholar
[30] H. M. Srivastava, M. Bansal, and P. Harjule, A study of fractional integral operators involving a certain generalized multi-index Mittag-Leffler function, Math. Methods Appl. Sci. 41 (16) (2018), 6108–6121. https://doi.org/10.1002/mma.5122 Google Scholar
[31] H. M. Srivastava and Z. Tomovski, Fractional calculus with an integral operator containing a generalized Mittag-Leffler function in the kernel, Appl. Math. Comput. 211 (1) (2009), 198–210. https://doi.org/10.1016/j.amc.2009.01.055 Google Scholar
[32] H. M. Srivastava, On an extension of the Mittag-Leffler function, Yokohama Math. J. 16 (1968), 77–88. Google Scholar
[33] S. S. Varma, T. Rosy, and U. Vadivelan, Radius of exponential convexity of certain subclass of analytic functions, Creat. Math. Inform. 29 (1) (2020), 109–112. https://doi.org/10.37193/CMI.2020.01.13 Google Scholar
[34] E. Umadevi and K. R. Karthikeyan, A Subclass of Close-to-Convex Function Involving Srivastava-Tomovski Operator, Recent Developments in Algebra and Analysis, ICRDM 2022, Trends in Mathematics, Birkhäuser, Cham (2024). https://doi.org/10.1007/978-3-031-37538-5_25 Google Scholar