Mathematically, this can be explained as: Let G be a graph with vertex set {v 1 , v 2 , v 3 , . Undirected definition is - not directed : not planned or guided. Undirected graph definition: An undirected graph is a set of nodes and a set of links between the nodes. What does undirected graph mean? . Dr. Mahfuza Farooque (Penn State) Discrete Mathematics: Lecture 33 April 4, 2016 10 / 19 A clique, C, in an undirected graph G = (V, E) is a subset of the vertices, C ⊆ V, such that every two distinct vertices are adjacent.This is equivalent to the condition that the induced subgraph of G induced by C is a complete graph.In some cases, the term clique may also refer to the subgraph directly. Information and translations of undirected graph in the most comprehensive dictionary definitions resource on the web. A unidirectional graph is another name for an undirected graph. Definition of undirected graph in the dictionary. A bidirectional graph is a directed graph obtained from an undirected graph by replacing each edge $\{x,y\}$ by a pair of edges $(x,y),(y,x)$. A graph in which every edge is directed edge is called a digraph or directed graph. Undirected Graph: A graph in which every edge is undirected edge is called an undirected graph. Undirected graphs usually are drawn with straight lines between the vertices. For an undirected graph, the value a ij = a ji for all i, j , so that the adjacency matrix becomes a symmetric matrix. , v n }, then the adjacency matrix of G is the n × n matrix that has a … Graph (Undirected) Union Graph The union of two simple graphs G 1 = (V 1, E 1) and G 2 = (V 2, E 2) is the simple graph with vertex set V 1 ∩ V 2 and edge set E 1 ∩ E 2. The union of G 1 and G 2 is denoted by G 1 ∩ G 2. Mixed Graph: If some edges are directed and some are undirected in a graph, the graph is called an mixedgraph. In a directed graph the order of the vertices in the pairs in the edge set matters. We use the names 0 through V-1 for the vertices in a V-vertex graph. A graph is a set of vertices and a collection of edges that each connect a pair of vertices. The order of the two connected vertices is unimportant. Two vertices u, v in an undirected graph G are called adjacent (or neighbors) in G if there is an edge e between u and v. Such an edge e is called incident with the vertices u and v and e is said to connect u and v. Definition … The adjacency relation is symetric in an undirected graph, so if u ~ v then it is also the case that v ~ u. Definitions. 4.1 Undirected Graphs. . An undirected graph is a finite set of vertices together with a finite set of edges. Meaning of undirected graph. A self-loop is an edge that connects a vertex to itself. Here are some definitions that we use. Each node is called a vertex, each link is called an edge, and each edge connects two vertices. How to use undirected in a sentence. Glossary. Directed Graphs. Graphs. Graph characteristics: Undirected graphs Definition 1.