1No vertices: 2 3No edges: 4 0 0 0 5 0 0 0 6 0 0 0 7 8Disconnected graph with loops and multiple edges: 9 0 1 1 0 0 0 10 0 1 0 1 0 0 11 1 0 0 1 0 0 12 0 0 0 0 2 0 13 0 0 0 0 0 0 14 0 0 0 0 0 0 15 16Same graph, undirected, symmetric matrix: 17 0 1 2 0 0 0 18 1 1 0 1 0 0 19 2 0 0 1 0 0 20 0 1 1 0 2 0 21 0 0 0 2 0 0 22 0 0 0 0 0 0 23 24Same graph, undirected, upper triangular matrix: 25 0 1 2 0 0 0 26 0 1 0 1 0 0 27 0 0 0 1 0 0 28 0 0 0 0 2 0 29 0 0 0 0 0 0 30 0 0 0 0 0 0 31 32Same graph, undirected, lower triangular matrix: 33 0 0 0 0 0 0 34 1 1 0 0 0 0 35 2 0 0 0 0 0 36 0 1 1 0 0 0 37 0 0 0 2 0 0 38 0 0 0 0 0 0 39 40