Abstract
In light of the Alexander transformation, the class of spirallike functions is significant. The characteristics of special functions also appear very frequently in Geometric function theory. In this paper, we find the radii of \(\gamma \)-spirallike and convex \(\gamma \)-spirallike of order \(\alpha \) of certain special functions.
Similar content being viewed by others
Data availability
None.
References
Aktaş, İ, Baricz, Á., Orhan, H.: Bounds for radii of starlikeness and convexity of some special functions. Turk. J. Math. 42, 211–226 (2018). https://doi.org/10.3906/mat-1610-41
Baricz, Á., Dimitrov, D.K., Orhan, H., Yağmur, N.: Radii of starlikeness of some special functions. Proc. Am. Math. Soc. 144, 3355–3367 (2016). https://doi.org/10.1090/proc/13120
Baricz, Á., Kupán, P.A., Szász, R.: The radius of starlikeness of normalized Bessel functions of the first kind. Proc. Am. Math. Soc. 142, 2019–2025 (2014). https://doi.org/10.1090/S0002-9939-2014-11902-2
Baricz, Á., Ponnusamy, S., Singh, S.: Turán type inequalities for Struve functions. J. Math. Anal. Appl. 445, 971–984 (2017). https://doi.org/10.1016/j.jmaa.2016.08.026
Baricz, Á., Prajapati, A.: Radii of starlikeness and convexity of generalized Mittag-Leffler functions. Math. Commun. 25, 117–135 (2020)
Baricz, Á., Toklu, E., Kadioğlu, E.: Radii of starlikeness and convexity of Wright functions. Math. Commun. 23, 97–117 (2018)
Baricz, Á., Yağmur, N.: Geometric properties of some Lommel and Struve functions. Ramanujan J. 42, 325–346 (2017). https://doi.org/10.1007/s11139-015-9724-6
Bulut, S., Engel, O.: The radius of starlikeness, convexity and uniform convexity of the Legendre polynomials of odd degree. Results Math. 74, Paper No. 48, 9 pp (2019). https://doi.org/10.1007/s00025-019-0975-1
Deniz, E., Kazımoğlu, S., Çağlar, M.: Radii of uniform convexity of Lommel and struve functions. Bull. Iran. Math. Soc. 47(5), 1533–1557 (2021)
Deniz, E.: Geometric and monotonic properties of Ramanujan type entire functions. Ramanujan J. 55, 103–130 (2020). https://doi.org/10.1007/s11139-020-00267-w
Deniz, E., Szász, R.: The radius of uniform convexity of Bessel functions. J. Math. Anal. Appl. 453, 572–588 (2017). https://doi.org/10.1016/j.jmaa.2017.03.079
Dimitrov, D.K., Ben Cheikh, Y.: Laguerre polynomials as Jensen polynomials of Laguerre-Pólya entire functions. J. Comput. Appl. Math. 233, 703–707 (2009). https://doi.org/10.1016/j.cam.2009.02.039
Gangania, K., Kumar, S.S.: \(\cal{S}^*(\psi )\) and \(\cal{C}(\psi )\)-radii for some special functions. Iran. J. Sci. Technol. Trans. A Sci. 46, 955–966 (2022)
Ismail, M.E.H., Zhang, R.: \(q\)-Bessel functions and Rogers-Ramanujan type identities. Proc. Am. Math. Soc. 146, 3633–3646 (2018). https://doi.org/10.1090/proc/13078
Ismail, M.E.H.: Classical and quantum orthogonal polynomials in one variable. In: Encyclopedia of Mathematics and its Applications, vol. 98. Cambridge University Press, Cambridge (2005)
Gangania, K., Kumar S.S.: Certain Radii problems for \(\cal{S}^{*}(\psi )\) and Special funtions, Mathematica Slovaca, (2023) (To appear). arXiv:2007.07816v2
Kanas, S.: Harmonic Archimedean and hyperbolic spirallikeness. Anal. Math. Phys. 12, 133 (2022). https://doi.org/10.1007/s13324-022-00745-y
Kazımoğlu, S., Deniz, E.: The radii of starlikeness and convexity of the functions including derivatives of Bessel functions. Turk. J. Math. 46(3), 894–911 (2022)
Kazımoğlu, S., Deniz, E.: Radius problems for functions containing derivatives of bessel functions. Comput. Methods Funct. Theory (2022). https://doi.org/10.1007/s40315-022-00455-3
Kumar, H., Pathan, A.M.: On the distribution of non-zero zeros of generalized Mittag-Leffler functions. Int. J. Eng. Res. Appl. 6, 66–71 (2016)
Levin, B.Y.: Lectures on Entire Functions. Translation of Mathematics Monographs, vol. 150. American Mathematical Society, Providence (1996)
Ma, W.C., Minda, D.: A unified treatment of some special classes of univalent functions. In: Proceedings of the Conference on Complex Analysis, Tianjin, Conf Proc Lecture Notes Anal, I, pp. 157–169. Int Press. Cambridge, MA (1992)
Ma, X.S., Ponnusamy, S., Sugawa, T.: Harmonic spirallike functions and harmonic strongly starlike functions. Monatsh Math. 199, 363–375 (2022). https://doi.org/10.1007/s00605-022-01708-y
Pfaltzgraff, J.A.: Univalence of the integral of \(f^{\prime } (z)^{\lambda }\). Bull. Lond. Math. Soc. 7(3), 254–256 (1975)
Prabhakar, T.R.: A singular integral equation with a generalized Mittag Leffler function in the kernel. Yokohama Math. J. 19, 7–15 (1971)
Ramanujan, S.: The Lost Notebook and Other Unpublished Papers. Springer, Berlin (1988)
Robertson, M.S.: Univalent functions \(f(z)\) for which \(zf^{\prime } (z)\) is spirallike. Mich. Math. J. 16, 97–101 (1969)
Spacek, L.: Contribution á la thèorie des fonctions univalentes, Casop Pest. Mat.-Fys. 62, 12–19 (1933)
Acknowledgements
We are thankful to the Editor and the Reviewers for their valuable suggestions to improve the previous version of this manuscript.
Author information
Authors and Affiliations
Contributions
All Authors contributed equally and reviewed the manuscript
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Kazımoğlu, S., Gangania, K. Radius of \(\gamma \)-spirallikeness of order \(\alpha \) of some special functions. Complex Anal Synerg 9, 14 (2023). https://doi.org/10.1007/s40627-023-00125-7
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s40627-023-00125-7
Keywords
- \(\gamma \)-Spirallike functions
- Radius problem
- Special functions
- Wright functions
- Ramanujan type entire functions