Definition:Reachable/Definition 2

Definition

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

Let $\RR$ be the reachability relation of $G$.

That is, $\RR$ is the transitive closure of $A$.

Let $u, v \in V$.

Then $v$ is reachable from $u$ if and only if $u \mathrel \RR v$.

Also see

• Equivalence of Definitions of Reachable

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