Two Phase Transitions in Two-way Bootstrap Percolation
arXiv:1809.10764
Abstract
Consider a graph and an initial random configuration, where each node is black with probability and white otherwise, independently. In discrete-time rounds, each node becomes black if it has at least black neighbors and white otherwise. We prove that this basic process exhibits a threshold behavior with two phase transitions when the underlying graph is a -dimensional torus and identify the threshold values.