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arXiv 1809.05092math.PRmath.CO
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四边形剖分上边翻转的多项式混合时间

Polynomial mixing time of edge flips on quadrangulations

Alessandra Caraceni, Alexandre Stauffer

摘要:

我们建立了第一个多项式上界的随机边缘翻转的混合时间的根四边形:我们表明,$n$面临的四边形的边缘翻转马尔可夫链的频谱间隙承认,直到常数,上界的$n^{-5/4}$和下界的$n^{-11/2}$。为了得到该下界,我们还考虑了平面树上(或等价地,Dyck路径上)的一个非常自然的马尔可夫链,并改进了Shor和Movassagh得到的谱间隙的下界.

英文摘要:

We establish the first polynomial upper bound for the mixing time of random edge flips on rooted quadrangulations: we show that the spectral gap of the edge flip Markov chain on quadrangulations with $n$ faces admits, up to constants, an upper bound of $n^{-5/4}$ and a lower bound of $n^{-11/2}$. In order to obtain the lower bound, we also consider a very natural Markov chain on plane trees (or, equivalently, on Dyck paths) and improve the previous lower bound for its spectral gap obtained by Shor and Movassagh.

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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