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arXiv 1003.3950math.PR
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渗流中的格嵌入

Lattice embeddings in percolation

Geoffrey R. Grimmett, Alexander E. Holroyd

摘要:

当渗流参数p充分接近1时,是否存在$\mathbb{Z}^d$到$\mathbb{Z}^D$上的点渗流过程的开集的Lipschitz注入?我们证明了一个否定的答案时,d=D,也当$d\geq2$,如果Lipschitz常数M是必需的1。Dirr,Dondl,Grimmett,Holroyd和Scheutzow的早期工作对d<D和M=2给出了肯定的答案。结果,对于所有d、D和M,上述问题都得到了回答。我们在d=D的情况下的证明使用了拓扑组合学中的塔克引理,以及前面提到的d<D的结果。一个应用程序是一个肯定的回答问题Peled关于嵌入的随机模式在两个和更多的层面。

英文摘要:

Does there exist a Lipschitz injection of $\mathbb{Z}^d$ into the open set of a site percolation process on $\mathbb{Z}^D$, if the percolation parameter p is sufficiently close to 1? We prove a negative answer when d=D and also when $d\geq2$ if the Lipschitz constant M is required to be 1. Earlier work of Dirr, Dondl, Grimmett, Holroyd and Scheutzow yields a positive answer for d<D and M=2. As a result, the above question is answered for all d, D and M. Our proof in the case d=D uses Tucker's lemma from topological combinatorics, together with the aforementioned result for d<D. One application is an affirmative answer to a question of Peled concerning embeddings of random patterns in two and more dimensions.

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