Edge connectivity
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The edge connectivity of an undirected graph is the minimum number <i>k</i> of edges that must be removed to disconnect the graph. For example, the edge connectivity of a tree is 1, and the edge connectivity of a cyclic chain of vertices is 2. Show how the edge connectivity of an undirected graph G = (V, E) can be determined by running a maximum-flow algorithm on at most |V| flow networks, each having O(V) vertices and O(E) edges.
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Edge connectivity is emphasized.
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Solution: (note: != means "not equal to"; )
Construct a directed graph G' from G by replacing each edge {u, v} in G by two directed edges (u, v) and (v, u) in G'. Let g(u,v) be the maximum flow value from u to v through G' with all edge capacities
equal to one. Pick an arbitrary node u ...
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