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arXiv 1202.1322math.PR
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树上随机搅拌模型中的锐相变

Sharp phase transition in the random stirring model on trees

Alan Hammond

摘要:

我们证明了在无限高次正则树上的随机搅拌模型中,无限循环的相变是尖锐的。也就是说,我们证明存在d 0,使得对于任何d个\geq d_0,后代度为d的有根正则树上的随机搅拌模型几乎必然包含由半无限区间组成的无限循环的参数值集。这个区间左端的临界点至少为1/d + 1/(2d^2),至多为1/d + 2/(d^2)。这个版本是一个重大的修订,与一个更短的证明。主要的变化是对旧版本第4节中的论点进行了重新加工,这是由一位裁判提出的,并且使用了一种更简单的处理边界案件的方法,这消除了以前的第6节。

英文摘要:

We establish that the phase transition for infinite cycles in the random stirring model on an infinite regular tree of high degree is sharp. That is, we prove that there exists d_0 such that, for any d \geq d_0, the set of parameter values at which the random stirring model on the rooted regular tree with offspring degree d almost surely contains an infinite cycle consists of a semi-infinite interval. The critical point at the left-hand end of this interval is at least 1/d + 1/(2d^2) and at most 1/d + 2/(d^2). This version is a major revision, with a much shorter proof. Principal among the changes are a reworking of the argument in Section 4 of the old version, which was proposed by a referee, and the use of a simpler means of handling a boundary case, which eliminates the previous Section 6.

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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