If a network has several sources s 1 , , s k , show that it can be reduced to the case of a single source network by introducing a new vertex s and connecting s to s 1 , , s k , by k edges of capacity Similarly if there are several sinks Illustrate this idea by a network with two sources and two sinks

Question: If a network has several sources s 1 , , s k , show that it can be reduced to the case of

If a network has several sources s₁, · · ·, s_k, show that it can be reduced to the case of a single-source network by introducing a new vertex s and connecting s to s₁, · · ·, s_k, by k edges of capacity ∞. Similarly if there are several sinks. Illustrate this idea by a network with two sources and two sinks.

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