Articles

JULIA LIMITING DIRECTIONS OF ENTIRE SOLUTIONS OF COMPLEX DIFFERENTIAL EQUATIONS

  • Jun WANG ,
  • Xiao YAO ,
  • Chengchun ZHANG
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  • 1. School of Mathematical Sciences, Fudan University, Shanghai 200433, China;
    2. School of Mathematical Sciences and LPMC, Nankai University, Tianjin 300071, China

Received date: 2020-05-04

  Online published: 2021-09-01

Supported by

This work was supported by the National Natural Science Foundation of China (11771090, 11901311) and Natural Sciences Foundation of Shanghai (17ZR1402900).

Abstract

For entire or meromorphic function $f$, a value $\theta\in[0,2\pi)$ is called a Julia limiting direction if there is an unbounded sequence $\{z_n\}$ in the Julia set satisfying $\lim\limits_{n\rightarrow\infty}\arg z_n=\theta.$ Our main result is on the entire solution $f$ of $P(z,f)+F(z)f^s=0$, where $P(z,f)$ is a differential polynomial of $f$ with entire coefficients of growth smaller than that of the entire transcendental $F$, with the integer $s$ being no more than the minimum degree of all differential monomials in $P(z,f)$. We observe that Julia limiting directions of $f$ partly come from the directions in which $F$ grows quickly.

Cite this article

Jun WANG , Xiao YAO , Chengchun ZHANG . JULIA LIMITING DIRECTIONS OF ENTIRE SOLUTIONS OF COMPLEX DIFFERENTIAL EQUATIONS[J]. Acta mathematica scientia, Series B, 2021 , 41(4) : 1275 -1286 . DOI: 10.1007/s10473-021-0415-7

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