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For questions related to the formulation or solution methodologies of network flow problems. Some of the well-known network flow problems are maximum flow problem, minimum-cost flow problem, and multi-commodity flow problem.
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Reformulating undirected to directed edges for MCF
From the reference provided in the paper (exercise on page 689 of the classic book Ahuja et al., 1993). The transformation is just to turn an undirected edge to a directed version. In this case also t …