adjacent_vertices       Adjacent vertices for all vertices in a graph
bfs                     Breadth-first search of a graph
degree                  Degree of vertices
edges                   Edges of a graph
graph                   Create a graph
incident_edges          Incident edges
is_loopy                Is this a loopy graph?
is_multigraph           Is this a multigraph?
is_simple               Is this a simple graph?
is_weighted             Is the graph weighted?
order                   Order of a graph
predecessors            Predecessors and successors
remove_loops            Remove loop edges from a graph
remove_multiple         Remove multiple edges from a graph
sanitize                Check the validity of a graph data structure
simplegraph             Simple Graph Data Types and Basic Algorithms
simplify                Remove multiple and loop edges from a graph
size                    The size of the graph is the number of edges
strength                Vertex strength: sum of weights of incident
                        edges
topological_sort        Topological sorting of a graph
transpose               Transpose a graph
vertex_ids              Vertex ids of a graph
vertices                Vertices of a graph, with metadata
