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The percolation process on a tree where infinite clusters are frozen

Abstract

Modify the usual percolation process on the infinite binary tree by forbidding infinite clusters to grow further. The ultimate configuration will consist of both infinite and finite clusters. We give a rigorous construction of a version of this process and show that one can do explicit calculations of various quantities, for instance the law of the time (if any) that the cluster containing a fixed edge becomes infinite. Surprisingly, the distribution of the shape of a cluster which becomes infinite at time t > 1/2 does not depend on t; it is always distributed as the incipient infinite percolation cluster on the tree. Similarly, a typical finite cluster at each time t > 1/2 has the distribution of a critical percolation cluster. This elaborates an observation of Stockmayer [12]. © 2000 Cambridge Philosophical Society.

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