Abstract model ·Graph:G=(V,E) V:set of nodes/vertices/points EV xV:set of edges 3 3 undirected graph: directed graph: Edges have no directions Edges have directions 3Abstract model ◼ Graph: 𝐺 = (𝑉, 𝐸) ❑ 𝑉: set of nodes/vertices/points ❑ 𝐸 ⊆ 𝑉 × 𝑉: set of edges 3 1 2 4 undirected graph: Edges have no directions directed graph: Edges have directions 3 1 2 4 3