Borel and Julia directions of meromorphic Schröder functions
Borel and Julia directions of meromorphic Schröder functions
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DOI:
10.1017/s0305004105008492
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发表时间:
2005-06
影响因子:
0.8
通讯作者:
K. Ishizaki;N. Yanagihara
中科院分区:
文献类型:
--
作者:
K. Ishizaki;N. Yanagihara
Meromorphic solutions of the Schröder equation $f(sz)\,{=}\,R(f(z)),$ where $|s|\,{>}\,1$ and $R(w)$ is a rational function with $\deg[R]\,{\geq}\,2$, are studied. We will show that, if $\arg[s]\notin 2\pi {\mathbb Q}$, then $f(z)$ has any Borel direction, without exceptional values other than Picard values, which depend on $R(w)$. Further the case $\arg[s]\,{\in}\,2 \pi {\mathbb Q}$ is also considered. We investigate the relation between Julia directions of $f(z)$ and the Julia set of $R(w)$.