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arXiv 2601.03384math.PR
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nilpotent群上共轭不变随机游走的混合时间界

Conjugacy-invariant random walks on nilpotent groups

Xiangying Huang

AI总结:

本文研究了nilpotent群上共轭不变随机游走的混合时间,通过与abelian化投影的比较,将问题简化为abelian设定,并应用于单位上三角矩阵群的cutoff分析。

摘要:

我们建立了有限nilpotent群上共轭不变随机游走的混合时间与它们在abelian化上的投影的混合时间之间的界。这种比较框架表明,在若干自然感兴趣的案例中,nilpotent群上的混合行为由其在abelian化上的投影游走的混合行为所支配,从而将混合研究简化为更简单的abelian设定中的问题。作为应用,这些界为之前由Arias-Castro、Diaconis和Stanley(2004)以及Nestoridi(2019)研究过的单位上三角矩阵群上的共轭不变随机游走的cutoff提供了结果。

英文摘要:

We establish bounds on the mixing times of conjugacy-invariant random walks on finite nilpotent groups in terms of the mixing times of their projections onto the abelianization. This comparison framework shows that, in several natural cases of interest, the mixing behavior on a nilpotent group is governed by that of the projected walk on the abelianization, reducing the study of mixing to a simpler problem in the Abelian setting. As an application, these bounds yield cutoff for two examples of conjugacy-invariant walks on unit upper-triangular matrix groups previously studied by Arias-Castro, Diaconis, and Stanley (2004) and by Nestoridi (2019).

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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