directed graph

Definition

A graph in which the edges are ordered pairs, so that, if the edge (a, b) is in the graph, the edge (b, a) need not be in the graph and is distinct from (a, b) if it is.

Example Sentences

• "A directed graph (A, R) is a set of vertices A together with an incidence relation R: if aRb then there is an edge going from A to B."