On the random-cluster model II. The percolation model

Abstract The relationship among several criteria of large-range connectivity in an infinite percolation model is investigated. In particular, we establish the equivalence, under a non-trivial condition, between weak and strong large-range connectivity, related, respectively, with the probability that a vertex belongs to an infinite cluster and the probability that a vertex is connected with vertices “very far away”. Furthermore, it is shown that the role of infinity can, in a certain sense, be taken over by a supplementary vertex.