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Forward Clusters for Degenerate Random Environments

Part of: Special processes

Published online by Cambridge University Press:  24 May 2016

MARK HOLMES  and
THOMAS S. SALISBURY
MARK HOLMES
Affiliation:
Department of Statistics, University of Auckland, 38 Princes Street, Auckland, 1010, New Zealand (e-mail: mholmes@stat.auckland.ac.nz)
THOMAS S. SALISBURY
Affiliation:
Department of Mathematics and Statistics, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada (e-mail: salt@yorku.ca)
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Abstract

We consider connectivity properties and asymptotic slopes for certain random directed graphs on ℤ2 in which the set of points $\mathcal{C}_o$ that the origin connects to is always infinite. We obtain conditions under which the complement of $\mathcal{C}_o$ has no infinite connected component. Applying these results to one of the most interesting such models leads to an improved lower bound for the critical occupation probability for oriented site percolation on the triangular lattice in two dimensions.

MSC classification

Primary: 60K35: Interacting random processes; statistical mechanics type models; percolation theory
Type
Paper
Information
Combinatorics, Probability and Computing , Volume 25 , Issue 5 , September 2016 , pp. 744 - 765
Copyright
Copyright © Cambridge University Press 2016 

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