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arXiv 2402.00265math.PR
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具有KPZ相关渐近行为的随机Motzkin路径的极限

Limits of Random Motzkin paths with KPZ related asymptotics

Wlodzimierz Bryc, Alexey Kuznetsov, Jacek Wesolowski

AI总结:

本文研究带一般权重的随机Motzkin路径在长度趋于无穷时两端段的极限行为,在两种区域中获得与半直线KPZ方程及猜想KPZ固定点平稳测度相关的Markov过程,并借助Al-Salam–Chihara多项式及$q$-特殊函数的极限性质完成证明。

摘要:

我们研究长度为$L$、边和端点带一般权重的Motzkin路径。我们考察随机Motzkin路径的初始段和末段在$L$变大时的极限行为,将其视为分别从两个端点出发的一对过程。随后我们研究所得到过程的宏观极限,在两种不同区域中我们得到出现在半直线上KPZ方程平稳测度描述中的Markov过程,以及假设的半直线上KPZ固定点猜想平稳测度描述中的Markov过程。我们的结果依赖于Al-Salam–Chihara多项式在其正交区间上端点邻域内的行为,以及$q$-Pochhammer符号和$q$-Gamma函数在$q\ earrow 1$时的极限性质。

英文摘要:

We study Motzkin paths of length $L$ with general weights on the edges and end points. We investigate the limit behavior of the initial and final segments of the random Motzkin path viewed as a pair of processes starting from each of the two end points as $L$ becomes large. We then study macroscopic limits of the resulting processes, where in two different regimes we obtain Markov processes that appeared in the description of the stationary measure for the KPZ equation on the half line and of conjectural stationary measure of the hypothetical KPZ fixed point on the half line. Our results rely on the behavior of the Al-Salam--Chihara polynomials in the neighbourhood of the upper end of their orthogonality interval and on the limiting properties of the $q$-Pochhammer and $q$-Gamma functions as $q\nearrow 1$.

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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