▾ Set of symbols
▾ Alphabet
▾ Deduction system
▾ Theory
▾ Zermelo-Fraenkel set theory
▾ Set
▾ Binary cartesian set product
▾ Binary relation
▾ Binary endorelation
▾ Digraph
Set of digraphs
Formulation 0
Let $X$ be a D11: Set.
The set of digraphs with respect to $X$ is the D11: Set \begin{equation} \{ G = (X, \mathcal{E}) : \mathcal{E} \subseteq X \times X \} \end{equation}