Representing Graphs

Representing Graphs: One way to represent a graph without multiple edges is to list all the edges of this graph. Another way to represent a graph with no multiple edges is to use adjacency lists, which specify the vertices that are adjacent to each vertex of the graph.

EXAMPLE 1 Use adjacency lists to describe the simple graph given in Figure 1.
Solution: Table 1 lists those vertices adjacent to each of the vertices of the graph.

EXAMPLE 2 Represent the directed graph shown in Figure 2 by listing all the vertices that are the terminal vertices of edges starting at each vertex of the graph.
Solution: Table 2 represents the directed graph shown in Figure 2.