ThmDex – An index of mathematical definitions, results, and conjectures.

▼	Set of symbols
▼	Alphabet
▼	Deduction system
▼	Theory
▼	Zermelo-Fraenkel set theory
▼	Set
▼	Binary cartesian set product
▼	Binary relation
▼	Binary endorelation
▼	Digraph

Definition D4526

Arrow set

Formulation 0

Let $G = (X, \mathcal{E})$ be a D2696: Digraph.
Then $\mathcal{E}$ is the arrow set in $G$.