Question: Let G be a directed graph on n vertices. If the associated undirected graph for G is Kn, prove that vV[od(v)]2 = vV [id(v)]2.

Let G be a directed graph on n vertices. If the associated undirected graph for G is Kn, prove that ∑v∈V[od(v)]2 = ∑v∈V [id(v)]2.

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