Let G = (V, E) be a directed graph, and suppose that for each node v, the number of edges into v is equal to the number of edges out of v. That is, for all v,
Let x, y be two nodes of G, and suppose that there exist k mutually edge-disjoint paths from x to y. Under these conditions, does it follow that there exist k mutually edge-disjoint paths from y to x? Give a proof or a counterexample with explanation.
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