Graph A collection of nodes and arcs to represent a structure Objects: A finite set of nodes (or vertices ,points) Relationship: A finite set of arcs (or edges, links) Formally, a graph is denoted by G = (V,E). V: a set of vertices E: a set of edges, a set of 2-elements of V In general, a graph may have parallel edgesand self loops. But, Simple graph don't have parallel edges and self loops. Ass..