Large deviation principle for the backward continued fraction expansion

Large deviation principle for the backward continued fraction expansion
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向后连分式展开的大偏差原理

DOI:
10.1016/j.spa.2021.11.002
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发表时间:
2022
影响因子:
1.4
通讯作者:
Hiroki Takahasi
Hiroki Takahasi
中科院分区:
数学3区
文献类型:
--
作者:
Tsumura;S;Y. Kawahigashi;Hiroki Takahasi

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研究了(0,1)中无理数向后连分式展开的随机性质。对于实值可观测量只依赖于展开式第一位数的均值过程,我们建立了大偏差原理。对于任何这样的观察是非负的,我们完全确定的速率函数的最小值的一组增长率的观察。我们的证明方法采用拓扑马尔可夫位移的热力学形式主义,和生成向后连分式展开的Rényi映射的逐点Lyapunov指数的多重分形分析。
We investigate stochastic properties of the backward continued fraction expansion of irrational numbers in (0, 1). For the mean process associated with a real-valued observable which depends only on the first digit of the expansion, we establish the large deviation principle. For any such observable which is non-negative, we completely determine the set of minimizers of the rate function in terms of a growth rate of the observable. Our method of proof employs the thermodynamic formalism for topological Markov shifts, and a multifractal analysis of pointwise Lyapunov exponents for the Rényi map generating the backward continued fraction expansion.
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