Graph Neural Networks, Deep Learning, Machine Learning, Artificial Intelligence, Gnn.
an unweighted graph, Aij = 1 if nodes i and j are connected, and 0 otherwise. The degree matrix D contains node degrees along the diagonal. The Laplacian quadratic form can measure smoothness of a signal f over G: fTLf = ∑i∼j (f(i) — f(j))2 This sums squared differences between connected nodes’