## Journal of the Mathematical Society of Japan

### Non-linearizability of n-subhyperbolic polynomials at irrationally indifferent fixed points

Yûsuke OKUYAMA

#### Abstract

We study the non-linearlizability conjecture (NLC) for polynomials at non-Brjuno irrationally indifferent fixed points. A polynomial is $n$-subhyperbolic if it has exactly $n$ recurrent critical points corresponding to irrationally indifferent cycles, other ones in the Julia set are preperiodic and no critical orbit in the Fatou set accumulates to the Julia set. In this article, we show that NLC and, more generally, the cycle-version of NLC are true in a subclass of $n$-subhyperbolic polynomials. As a corollary, we prove the cycle-version of the Yoccoz Theorem for quadratic polynomials.

We also study several specific examples of $n$-subhyperbolic polynomials. Here we also show the scaling invariance of the Brjuno condition: if an irrational number $\alpha$ satisfies the Brjuno condition, then so do $m\alpha$ for every positive integer $m$.

#### Article information

Source
J. Math. Soc. Japan, Volume 53, Number 4 (2001), 847-874.

Dates
First available in Project Euclid: 29 May 2008

https://projecteuclid.org/euclid.jmsj/1212067576

Digital Object Identifier
doi:10.2969/jmsj/05340847

Mathematical Reviews number (MathSciNet)
MR1852886

Zentralblatt MATH identifier
1030.37032

#### Citation

OKUYAMA, Yûsuke. Non-linearizability of n-subhyperbolic polynomials at irrationally indifferent fixed points. J. Math. Soc. Japan 53 (2001), no. 4, 847--874. doi:10.2969/jmsj/05340847. https://projecteuclid.org/euclid.jmsj/1212067576