Maximum-entropy moment-closure for stochastic systems on networks

T. Rogers

Published 2011 in Journal of Statistical Mechanics: Theory and Experiment

ABSTRACT

Moment-closure methods are popular tools for simplifying the mathematical analysis of stochastic models defined on networks, in which high dimensional joint distributions are approximated (often by some heuristic argument) as functions of lower dimensional distributions. Whilst undoubtedly useful, several such methods suffer from issues of non-uniqueness and inconsistency. These problems are solved by an approach based on the maximization of entropy, which is motivated, derived and implemented in this paper. A series of numerical experiments are also presented, detailing the application of the method to the susceptible–infected–recovered model of epidemics, as well as cautionary examples showing the sensitivity of moment-closure techniques in general.

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