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THE TUMURA–CLUNIE THEOREM IN SEVERAL COMPLEX VARIABLES

Part of: Holomorphic mappings and correspondences Holomorphic functions of several complex variables

Published online by Cambridge University Press:  13 June 2014

PEI-CHU HU  and
CHUNG-CHUN YANG
PEI-CHU HU*
Affiliation:
School of Mathematics, Shandong University, Jinan 250100, Shandong, PR China email pchu@sdu.edu.cn
CHUNG-CHUN YANG
Affiliation:
College of Science, China University of Petroleum (Huadong), Qingdao 266580, Shandong, PR China email wood.yang@family.ust.hk
*
✉pchu@sdu.edu.cn
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Abstract

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It is a well-known result that if a nonconstant meromorphic function $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}f$ on $\mathbb{C}$ and its $l$th derivative $f^{(l)}$ have no zeros for some $l\geq 2$, then $f$ is of the form $f(z)=\exp (Az+B)$ or $f(z)=(Az+B)^{-n}$ for some constants $A$, $B$. We extend this result to meromorphic functions of several variables, by first extending the classic Tumura–Clunie theorem for meromorphic functions of one complex variable to that of meromorphic functions of several complex variables using Nevanlinna theory.

Keywords

meromorphic functionNevanlinna theoryTumura–Clunie theorem

MSC classification

Secondary: 32A15: Entire functions 32A20: Meromorphic functions 32A22: Nevanlinna theory (local); growth estimates; other inequalities 32H30: Value distribution theory in higher dimensions
Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 90 , Issue 3 , December 2014 , pp. 444 - 456
Copyright
Copyright © 2014 Australian Mathematical Publishing Association Inc. 

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