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arXiv 0705.4057math.DSmath-phmath.MP
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Poncelet对和与Poncelet台球相关的扭曲地图

Poncelet pairs and the Twist Map associated to the Poncelet Billiard

Artur O. Lopes, M. Sebastiani

摘要:

我们证明了对于固定曲线$K$和一族变量曲线$L$,$n$ -Poncelet对的个数是$\frac{e (n)}{2}$,其中$e(n)$是小于$n$的自然数$m$的个数,并且满足mcd $ (m,n)=1$ .曲线$K$不必是族的一部分。为了证明这一结果,我们考虑了一个相关的台球变换和扭曲地图,保持面积。我们利用Aubry-Mather理论和不变曲线的旋转数得到了我们的主要结果。在最后一节中,我们利用连分数展开的一些性质估计了一般扭曲映射的旋转数的导数。

英文摘要:

We show that for a fixed curve $K$ and for a family of variables curves $L$, the number of $n$-Poncelet pairs is $\frac{e (n)}{2}$, where $e(n)$ is the number of natural numbers $m$ smaller than $n$ and which satisfies mcd $ (m,n)=1$. The curvee $K$ do not have to be part of the family. In order to show this result we consider an associated billiard transformation and a twist map which preserves area. We use Aubry-Mather theory and the rotation number of invariant curves to obtain our main result. In the last section we estimate the derivative of the rotation number of a general twist map using some properties of the continued fraction expansion .

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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