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arXiv 0801.1639math.DS
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圆的刚性转动和圆的自同态的行程

Itineraries of rigid rotations and diffeomorphisms of the circle

David Richeson, Paul Winkler, Jim Wiseman

摘要:

我们研究了$0\in S^{1}=\R/\Z$在$α\in\R\bs\Q$轮换下的行程。激励性的问题是:如果我们只给出0相对于$I\subset S^{1}$的行程,一个闭区间的有限并集,我们能恢复$α$和$I$吗?我们证明,行程确定$α$和$I$一定的等价性。然后给出了求$α$和$I$的基本方法。此外,如果$g:S^{1}\to S^{1}$是一个$C^{2}$,方向保持同构与无理旋转数,那么我们可以使用轨道行程恢复旋转数,直到某些等价。

英文摘要:

We examine the itinerary of $0\in S^{1}=\R/\Z$ under the rotation by $α\in\R\bs\Q$. The motivating question is: if we are given only the itinerary of 0 relative to $I\subset S^{1}$, a finite union of closed intervals, can we recover $α$ and $I$? We prove that the itineraries do determine $α$ and $I$ up to certain equivalences. Then we present elementary methods for finding $α$ and $I$. Moreover, if $g:S^{1}\to S^{1}$ is a $C^{2}$, orientation preserving diffeomorphism with an irrational rotation number, then we can use the orbit itinerary to recover the rotation number up to certain equivalences.

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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