Question: If G is an undirected graph with n vertices and e edges, let = minvV{deg(v)} and let = maxvV{deg(v)}. Prove that

If G is an undirected graph with n vertices and e edges, let δ = minv∈V{deg(v)} and let ∆ = maxv∈V{deg(v)}. Prove that δ ≤ 2(e/n) < ∆.

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