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arXiv 1909.09053math.PRmath.NT
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有限域上ax+b马尔可夫链的截断现象

Cut-off phenomenon for the ax+b Markov chain over a finite field

Emmanuel Breuillard, Péter P. Varjú

摘要:

研究了有限域$\mathbb{F}_p$上的马尔可夫链$x_{n+1}=ax_n+b_n$,其中$a \in \mathbb{F}_p$是固定的,$b_n$是$\mathbb{F}_p$中独立同分布的随机变量.在黎曼假设的前提下,我们证明了链对于大多数素数$p$和大多数$a \in \mathbb{F}_p$值都表现出截断现象。我们还获得了较弱的,但无条件的,上界的混合时间。

英文摘要:

We study the Markov chain $x_{n+1}=ax_n+b_n$ on a finite field $\mathbb{F}_p$, where $a \in \mathbb{F}_p$ is fixed and $b_n$ are independent and identically distributed random variables in $\mathbb{F}_p$. Conditionally on the Riemann hypothesis for all Dedekind zeta functions, we show that the chain exhibits a cut-off phenomenon for most primes $p$ and most values of $a \in \mathbb{F}_p$. We also obtain weaker, but unconditional, upper bounds for the mixing time.

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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