Exercise 6.1 Find the number of different shortest paths from point A to point B in a city with...

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Network We have a digraph G with edge capacities u: E(G)→ R + and two specified vertices s (the source) and t (the sink). The quadruple (G, u, s, t) is sometimes called a network. Our main motivation is to transport as many units as possible simultaneously from s to t. A solution to this problem will be called a maximum flow.