If K is not constant, and there is no correlation between the in-degrees and out-degrees, the conditions of stability is determined by ⟨ ⟨ K i n ⟩ ⟩ The network is stable if ⟨ ⟨ K i n ⟩ ⟩ < K c , critical if ⟨ ⟨ K i n ⟩ ⟩ = K c , and unstable if ⟨ ⟨ K i n ⟩ ⟩ > K c .