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arXiv 2208.04576math.DS
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SRB测度维数的二分法

A Dichotomy for the dimension of SRB measure

Haojie Ren

摘要:

我们研究由斜积生成的动力系统:$$T: [0,1)\times\mathbb{R}\to [0,1)\times\mathbb{R} \quad\quad T(x,y)=(bx\mod1,γy+ϕ(x))$$其中整数$b\ge2$,$0<γ<1$和$ϕ$是一个实解析$\mathbb{Z}$ -周期函数。证明了$T$的SRB测度$ω$的二分法:要么$ω$的支撑是实解析函数的图,要么$ω$的维数等于$\min\{2,1+\frac{\log b}{\log1/γ}\}$ .此外,给定$b$和$ϕ$,除非$ϕ$是常数,否则前一种选择仅发生在多个$γ$上。

英文摘要:

We study dynamical systems generated by skew products: $$T: [0,1)\times\mathbb{R}\to [0,1)\times\mathbb{R} \quad\quad T(x,y)=(bx\mod1,γy+ϕ(x))$$ where integer $b\ge2$, $0<γ<1$ and $ϕ$ is a real analytic $\mathbb{Z}$-periodic function. We prove the following dichotomy for the SRB measure $ω$ for $T$: Either the support of $ω$ is a graph of real analytic function, or the dimension of $ω$ is equal to $\min\{2,1+\frac{\log b}{\log1/γ}\}$. Furthermore, given $b$ and $ϕ$, the former alternative only happens for finitely many $γ$ unless $ϕ$ is constant.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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