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arXiv 2012.02514math.DS
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解析双同态的亚纯首次积分

Meromorphic first integrals of analytic diffeomorphisms

Antoni Ferragut, Armengol Gasull, Xiang Zhang

摘要:

本文给出了由解析映射$f$生成的离散动力系统在其不动点邻域内函数独立的亚纯首次积分个数的上界.这个界限是根据$f$在这一点上的微分的特征值之间的共振而得到的。我们的方法的灵感来自于类似的庞加莱型结果的常微分方程。我们还将我们的结果应用到几个例子中,其中一些是由几个差分方程的研究所激发的。

英文摘要:

We give an upper bound for the number of functionally independent meromorphic first integrals that a discrete dynamical system generated by an analytic map $f$ can have in a neighborhood of one of its fixed points. This bound is obtained in terms of the resonances among the eigenvalues of the differential of $f$ at this point. Our approach is inspired on similar Poincaré type results for ordinary differential equations. We also apply our results to several examples, some of them motivated by the study of several difference equations.

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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