Abstract
Interconnected networks have been shown to be much more vulnerable to
random and targeted failures than isolated ones, raising several
interesting questions regarding the identification and mitigation of
their risk. The paradigm to address these questions is the percolation
model, where the resilience of the system is quantified by the
dependence of the size of the largest cluster on the number of failures.
Numerically, the major challenge is the identification of this cluster
and the calculation of its size. Here, we propose an efficient algorithm
to tackle this problem. We show that the algorithm scales as O(N logN),
where N is the number of nodes in the network, a significant improvement
compared to O(N-2) for a greedy algorithm, which permits studying much
larger networks. Our new strategy can be applied to any network topology
and distribution of interdependencies, as well as any sequence of
failures. DOI: 10.1103/PhysRevE.87.043302
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