\begin{definition}[Definition:Incident (Graph Theory)/Digraph/Incident To]
Let $G = \struct {V, E}$ be a digraph.
Let $u, v \in V$ be vertices of $G$.
Let $e = \tuple {u, v}$ be an arc that is directed from $u$ to $v$:
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Then:
: $e$ is '''incident to $v$'''
: $u$ is '''incident to $e$'''.
Category:Definitions/Digraphs
\end{definition}