Abstract
Brück’s conjecture asserts that if a non-constant entire function f(z) with hyper-order \(\rho _{2}(f) \not \in \mathbb {N}\cup \{\infty \}\) shares one finite value a CM (counting multiplicities) with its derivative, then \(f'-a=c(f-a)\), for some non-zero constant c. This conjecture has been affirmed for entire functions with finite order and hyper-order less than one. In this paper, we show that Brück’s conjecture is true for entire functions that satisfy second order differential equations with meromorphic coefficients of finite order.
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References
Brück, R.: On entire functions which share one value CM with their first derivative. Results Math. 30, 21–24 (1996)
Cao, T.B.: On the Brück conjecture. Bull. Aust. Math. Soc. 93(2), 248–259 (2016)
Chen, Z.X., Shon, K.H.: On conjecture of R. Brü ck concerning the entire function sharing one value CM with its derivative, Taiwanese J. Math. 8, No. 2, 235-244 (2004)
Chen, Z.X., Shon, K.H.: Subnormal solutions of differential equations with periodic coefficients, Acta Math. Sci., Ser. B, Engl. Ed. 30, 75-88 (2010)
Chen, Z.X., Yang, C.C.: Quantitative estimations on the zeros and growth of entire solutions of linear differential equations.Complex Var. Theory Appl. 42, 119-133 (2000)
Gundersen, G.G.: Meromorphic functions that share two finite values with their derivative. Pac. J. Math. 105, 299–309 (1983)
Gundersen, G.G., Yang, L.Z.: Entire functions that share one value with one or two of their derivatives. J. Math. Anal. Appl. 223, 88–95 (1998)
Hayman, W.K.: Meromorphic Functions. Clarendon Press, Oxford (1964)
Laine, I.: Nevanlinna Theory and Complex Differential Equations. Walter de Gruyter, Berlin-New York (1993)
Li, X.M., Gao, C.C.: Entire functions sharing one polynomial with their derivatives, Proc. Indian Acad. Sci. (Math. Sci.) 118, No. 1, 13-26 (2008)
Mues, E., Steinmetz, N.: Meromorphe Funktionen, die mit ihrer Ableitung zwei Werte teilen. Results Math. 6, 48–55 (1983)
Nevanlinna, R.: Théorème de Picard-Borel et la Théorie des Fonctions Méromorphes. Gauthiers-Villars, Paris (1929)
Rubel, L.A., Yang, C.C.: Values shared by an entire function and its derivative, Complex Analysis. Lect. Notes Math. 599, 101–103 (1977)
Tu, J., Yi, C.-F.: On the growth of solutions of a class of higher order linear differential equations with coefficients having the same order. J. Math. Anal. Appl. 340, 487–497 (2008)
Yang, C.C., Yi, H.X.: Uniqueness Theory of Meromorphic Functions. Science Press and Kluwer Acad. Publ, Beijing (2003)
Zhang, G.: Brück conjecture with hyper-order less than one. arXiv, 8 pp. https://arxiv.org/pdf/1705.08123.pdf (2017)
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Dida, R., El Farissi, A. Brück’s Conjecture for Solutions of Second-Order Complex ODE. Mediterr. J. Math. 21, 114 (2024). https://doi.org/10.1007/s00009-024-02642-z
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DOI: https://doi.org/10.1007/s00009-024-02642-z