Abstract:The vitality of an edge in a graph with respect to the maximum flow between two fixed vertices s and t is defined as the reduction of the maximum flow value caused by the removal of that edge.The max-flow vitality problem has already been efficiently solved for st-planar graphs but has remained open for general planar graphs. For the first time our result provides an optimal solution for general planar graphs although restricted to the case of unweighted planar graphs.
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