Toeplitz商C* 代数与随机游动的比极限
Toeplitz quotient C*-algebras and ratio limits for random walks
摘要:
本文研究了随机游动的Toeplitz C* 代数的子空间,类似于作者和Markiewicz对有限随机阵的研究.对于具有转移概率收敛比的随机游动,我们引入了一个新的Cuntz型商C* 代数.这些C* 代数引起了新的概念比极限空间和边界的随机游动,这是计算呼吁的同伴文件Woess。我们的综合结果被用来确定一个唯一的最小的对称等变商C*-代数的任何对称随机游动的双曲群,揭示了一个问题的Viselter的C* 代数的子积系统。
英文摘要:
We study quotients of the Toeplitz C*-algebra of a random walk, similar to those studied by the author and Markiewicz for finite stochastic matrices. We introduce a new Cuntz-type quotient C*-algebra for random walks that have convergent ratios of transition probabilities. These C*-algebras give rise to new notions of ratio limit space and boundary for such random walks, which are computed by appealing to a companion paper by Woess. Our combined results are leveraged to identify a unique smallest symmetry-equivariant quotient C*-algebra for any symmetric random walk on a hyperbolic group, shedding light on a question of Viselter on C*-algebras of subproduct systems.
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