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arXiv 1003.2816math.DS
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有限秩Bratteli图:不变测度的结构

Finite Rank Bratteli Diagrams: Structure of Invariant Measures

Sergey Bezuglyi, Jan Kwiatkowski, Konstantin Medynets, Boris Solomyak

摘要:

我们考虑有限秩的Bratteli图(不一定是简单的)和关于其道路空间上的共尾等价关系的遍历不变测度.证明了每个遍历不变测度(有限或“正则”无限)都是由简单子图的扩张得到的。我们进一步研究了这些测度的定量性质,这些性质主要由关联矩阵乘积的渐近性质决定。得到了唯一遍历的若干充分条件。其中之一是精确有限秩的条件,这与可测动力学中的类似概念相似。几个例子说明了有限型图和不变测度对他们的广泛的可能行为。然后证明了有限秩图的道路空间上的Vershik映射不可能是强混合的,与序无关。另一方面,对于所谓的“连续”排序,Vershik映射在所有有限秩图上不是强混合的。

英文摘要:

We consider Bratteli diagrams of finite rank (not necessarily simple) and ergodic invariant measures with respect to the cofinal equivalence relation on their path spaces. It is shown that every ergodic invariant measure (finite or "regular" infinite) is obtained by an extension from a simple subdiagram. We further investigate quantitative properties of these measures, which are mainly determined by the asymptotic behavior of products of incidence matrices. A number of sufficient conditions for unique ergodicity are obtained. One of these is a condition of exact finite rank, which parallels a similar notion in measurable dynamics. Several examples illustrate the broad range of possible behavior of finite type diagrams and invariant measures on them. We then prove that the Vershik map on the path space of an exact finite rank diagram cannot be strongly mixing, independent of the ordering. On the other hand, for the so-called "consecutive" ordering, the Vershik map is not strongly mixing on all finite rank diagrams.

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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