# Definition:Directed Graph/Arc

(Redirected from Definition:Arc of Digraph)

## Definition

Let $G = \struct {V, E}$ be a digraph.

The arcs are the elements of $E$.

Informally, an arc is a line that joins one vertex to another.

If $e \in E$ is an arc joining the vertex $u$ to the vertex $v$, it is denoted $u v$.

### Endvertex

Let $D = \struct {V, E}$ be a digraph.

Let $e = u v$ be an arc of $D$, that is, $e \in E$.

The endvertices of $e$ are the vertices $u$ and $v$.