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arXiv 1901.09191math.DSmath.NT
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关于m的Roth型条件、对偶与中心Birkhoff和

On Roth type conditions, duality and central Birkhoff sums for i.e.m

Stefano Marmi, Corinna Ulcigrai, Jean-Christophe Yoccoz

摘要:

我们引入了关于区间交换映射(即m)和平移曲面的旋转数的两个丢番图条件:\emph{absolute Roth type condition}是Roth型(即m)概念的弱化,而\emph{dual Roth type}条件是关于平移表面的\emph{backward}旋转数的条件。我们证明了以前在\cite{MY}中证明的限制Roth型上同调方程的结果,即m. (on在许多障碍下的可解性和解的正则性)可以推广到限制的\emph{absolute} Roth型即m.在对偶Roth型条件下,我们关联到一类函数的遍历平均值的PDMATHAMR偏差(对应于相对同调类)的\emph{distributional}极限形状,这是以类似的方式构建的\emph{limit shapes}的Birkhoff和关联在\cite{MMY3}的功能,对应于积极的李雅普诺夫指数。

英文摘要:

We introduce two Diophantine conditions on rotation numbers of interval exchange maps (i.e.m) and translation surfaces: the \emph{absolute Roth type condition} is a weakening of the notion of Roth type i.e.m., while the \emph{dual Roth type} condition is a condition on the \emph{backward} rotation number of a translation surface. We show that results on the cohomological equation previously proved in \cite{MY} for restricted Roth type i.e.m. (on the solvability under finitely many obstructions and the regularity of the solutions) can be extended to restricted \emph{absolute} Roth type i.e.m. Under the dual Roth type condition, we associate to a class of functions with \emph{subpolynomial} deviations of ergodic averages (corresponding to relative homology classes) \emph{distributional} limit shapes, which are constructed in a similar way to the \emph{limit shapes} of Birkhoff sums associated in \cite{MMY3} to functions which correspond to positive Lyapunov exponents.

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