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arXiv 1912.04428math.DS
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通用旋转集

Generic Rotation Sets

Sebastián Pavez-Molina

摘要:

设$(X,T)$是一个拓扑动力系统.给定一个连续的向量值函数$F \in C(X, \mathbb{R}^{d})$,我们定义它的旋转集$R(F)$为$F$关于所有$T$不变概率测度的积分集,它是$\mathbb{R}^{d}$的凸体.本文研究了旋转集的几何。证明了如果$T$是一个具有稠密周期测度集的非唯一遍历拓扑动力系统,则映射$R(\cdot)$关于一致拓扑是开的。由此得到一般势的旋转集是严格凸的,并且有$C^{1}$边界。进一步证明了映射$R(\cdot)$是满射的,推广了Kucherenko和Wolf的一个结果.

英文摘要:

Let $(X,T)$ be a topological dynamical system. Given a continuous vector-valued function $F \in C(X, \mathbb{R}^{d})$ called a potential we define its rotation set $R(F)$ as the set of integrals of $F$ with respect to all $T$-invariant probability measures, which is a convex body of $\mathbb{R}^{d}$. In this paper, we study the geometry of rotation sets. We prove that if $T$ is a non-uniquely ergodic topological dynamical system with a dense set of periodic measures, then the map $R(\cdot)$ is open with respect to the uniform topologies. As a consequence, we obtain that the rotation set of a generic potential is strictly convex and has $C^{1}$ boundary. Furthermore, we prove that the map $R(\cdot)$ is surjective, extending a result of Kucherenko and Wolf.

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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