Fig. 1From: The Minimal k-Core Problem for Modeling k-AssembliesThreshold function \(f_{k}\) for \(k = 2\). On the left, we see the original graph with only the given set \(S = \{ 1, 2, 6\}\) excited, \(f_{k} (S)\) in the middle, and \(f_{k}^{2} (S)\) in the right Back to article page