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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 $u v$.


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 $v$.

Also see

  • Results about arcs of digraphs can be found here.