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A new principle for arbitrary meromorphic functions in a given domain

  • Grigor Barsegian EMAIL logo
Published/Copyright: April 25, 2018
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Abstract

This paper presents a new principle related to an arbitrary meromorphic function w in a given domain D. The main component of this principle gives (first time) lower bounds for |w| for a similar general class of functions. The principle can qualitatively be stated as follows: any set of simple a-points of w contains a “large” subset of complex values, where we have lower bounds for |w| and upper bounds for |w(h)|, h>1.

MSC 2010: 30D30; 30D35; 30E99

Dedicated to Professor Vakhtang Kokilashvili on the occasion of his 80th birthday


Funding statement: The author was supported by the Visiting Scholar Program of Guangzhou University which funded his position of leading visiting professor at the university.

Acknowledgements

The author thanks Professor Gary Gundersen for language corrections and the referee for careful checking.

References

[1] L. Ahlfors, Zur Theorie der Überlagerungsflächen, Acta Math. 65 (1935), 157–194. 10.1007/BF02420945Search in Google Scholar

[2] G. Barsegian, Estimates of derivatives of meromorphic functions on sets of a-points, J. Lond. Math. Soc. (2) 34 (1986), no. 3, 534–540. 10.1112/jlms/s2-34.3.534Search in Google Scholar

[3] G. Barsegian, Estimates of higher derivatives of meromorphic functions and the multiple points in the second main theorem of R. Nevanlinna, Bull. Hong Kong Math. Soc. 2 (1999), no. 2, 341–345. Search in Google Scholar

[4] G. Barsegian, I. Laine and D. T. Lê, On topological behaviour of solutions of some algebraic differential equations, Complex Var. Elliptic Equ. 53 (2008), no. 5, 411–421. 10.1080/17476930701666890Search in Google Scholar

[5] G. Barsegian and D. T. Lê, On a topological description of solutions of complex differential equations, Complex Var. Theory Appl. 50 (2005), no. 5, 307–318. 10.1080/02781070500032879Search in Google Scholar

[6] R. Nevanlinna, Eindeutige Analytische Funktionen, Grundlagen Math. Wiss. Einzeld. 46, Springer, Berlin, 1936. 10.1007/978-3-662-41799-7Search in Google Scholar

[7] C. Pommerenke, Univalent Functions, Studia Math. 25, Vandenhoeck & Ruprecht, Göttingen, 1975. Search in Google Scholar

Received: 2017-6-25
Revised: 2018-1-14
Accepted: 2018-1-16
Published Online: 2018-4-25
Published in Print: 2018-6-1

© 2018 Walter de Gruyter GmbH, Berlin/Boston

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