Articles

THE NORMALITY OF ALGEBROID MULTIFUNCTIONS AND THEIR COEFFICIENT FUNCTIONS

  • CAI FuJie GAO Zong Sheng
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  • LMIB &|School of Mathematics and Systems Science, Beihang University, Beijing 100191, China

Received date: 2014-01-04

  Revised date: 2014-04-15

  Online published: 2015-01-20

Supported by

This work is supported by NSFC (11171013, 11371225).

Abstract

In this paper, we investigate the normality relationship between algebroid mul-tifunctions and their coefficient functions. We prove that the normality of a k-valued entire algebroid multifunctions family is equivalent to their coefficient functions in some conditions. Furthermore, we obtain some new normality criteria for algebroid multifunctions families based on these results. We also provide some examples to expound that some restricted
conditions of our main results are necessary.

Cite this article

CAI FuJie GAO Zong Sheng . THE NORMALITY OF ALGEBROID MULTIFUNCTIONS AND THEIR COEFFICIENT FUNCTIONS[J]. Acta mathematica scientia, Series B, 2015 , 35(1) : 121 -132 . DOI: 10.1016/S0252-9602(14)60145-4

References

[1] Dufresnoy J. Th´eorie nouvelle des familles complexes normales; applications `a l’´etude des fonctions
alg´ebro¨?des. Ann L’ `Ecole Norm Sup, 1944, 61(3): 1–44
[2] Gan H L, Sun D C. Normality theorems of algebroid functions. Acta Math Sci, 2007, 27A(4): 611–615
[3] Gu Y X. Normal Families of Meromorphic Functions. Chengdu: Sichuan Education Press, 1991 (in Chinese)
[4] Gu Y X, Pang X C, Fang M L. Normal Families of Meromorphic Functions and Their Application. Beijing:
Science Press, 2007 (in Chinese)
[5] Hayman W K. Meromorphic Functions. Oxford: Clarendon Press, 1964
[6] He Y Z, Xiao X Z. Algebroidal Functions and Ordinary Differential Equation. Beijing: Science Press, 1988
(in Chinese)
[7] Katajam¨aki K. Algebroid solutions of binomial and linear differential equations. Ann Acad Sci Fenn Ser A
I Math Diss, 1993, 90
[8] Liu X K, Sun D C. A new normality criterion for algebroidal functions. Acta Math Sinica, 2004, 47(4):
731–734
[9] Sun D C. Normality criteria for families of meromorphic algebroidal functions. Acta Math Sci, 2010, 30B(1):
162–172
[10] Sun D C, Gao Z S. Value Distribution of Algebroid Function. Beijing: Science Press, 2014 (in Chinese)
[11] Sun D C, Kong Y Y. The growth of algebroidal functions. J Math Anal Appl, 2007, 332: 542–550
[12] Sun D C, Yang L. Normal families of algebroidal functions. Sci China Ser A, 2001, 44(10): 1271–1277
[13] Valiron G. Sur la d´eriv´ee des fonctions alg´ebroides. Bull Soc Math France, 1929, 59: 17–39
[14] Wang S M. The growth and singular direction of of algebroid functions. Ann Acad Sci Fenn Math, 2012,
37: 479–489
[15] Zalcman L. Normal families: new perspectives. Bull Amer Math Soc, 1998, 35: 215–230

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