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arXiv 1407.3496math.DS
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随机序不完美的Bratteli图

Bratteli diagrams where random orders are imperfect

Jeannette Janssen, Anthony Quas, Reem Yassawi

摘要:

对于简单的Bratteli图B,有一个单一的边缘连接任何两个顶点在连续的水平,我们证明了一个随机秩序有不可数多的无限路径当且仅当水平n顶点集的增长率是超线性的。这给了我们二分法:在缓慢增长的Bratteli图上的随机序允许同胚,而在快速增长的Bratteli图上的随机序不允许同胚。我们还表明,对于一个大家庭的无限秩Bratteli图,一个随机顺序B不承认一个连续的Vershik映射。

英文摘要:

For the simple Bratteli diagrams B where there is a single edge connecting any two vertices in consecutive levels, we show that a random order has uncountably many infinite paths if and only if the growth rate of the level-n vertex sets is super-linear. This gives us the dichotomy: a random order on a slowly growing Bratteli diagram admits a homeomorphism, while a random order on a quickly growing Bratteli diagram does not. We also show that for a large family of infinite rank Bratteli diagrams, a random order on B does not admit a continuous Vershik map.

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