A formula is obtained for the global flow of information in a discrete Markov system which is defined on a locally finite graph. It is shown that the information flow is related to a random walk on the lattice of finite subgraphs of the graph.

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Stochastic Processes and their Applications
Carleton University

Dawson, D.A. (1975). Information flow in graphs. Stochastic Processes and their Applications, 3(2), 137–151. doi:10.1016/0304-4149(75)90012-5