Flows on graphs with random capacities.
We investigate flows on graphs whose links have random capacities. For binary trees we derive the probability distribution for the maximal flow from the root to a leaf, and show that for infinite trees it vanishes beyond a certain threshold that depends on the distribution of capacities. We then examine the maximal total flux from the root to the leaves. Our methods generalize to simple graphs with loops, e.g., to hierarchical lattices and to complete graphs.
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Program for Evolutionary Dynamics, Harvard University, Cambridge, Massachusetts 02138, USA.
Krapivsky
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