Image:Graph-structure-mis-n04-01.png

An example of an undirected graph with four vertexes and four edges. For this example, the graph $$G=\langle V,E\rangle$$ can be defined as a tuple of a set of vertexes $$V$$ and a set of edges $$E$$ where:
 * $$V=\{v_1, v_2, v_3,v_4\}$$

and
 * $$E=\{(v_1,v_2), (v_1, v_3), (v_2,v_3), (v_3, v_4)\}$$.