ThmDex – An index of mathematical definitions, results, and conjectures.
Formulation F9809 on D2751: Hyperdigraph
F9809
Formulation 1
An D548: Ordered pair $G = (X, \mathcal{E})$ is a hyperdigraph with respect to $N \in 1, 2, 3, \ldots$ if and only if
(1) $X$ is a D11: Set
(2) \begin{equation} \mathcal{E} \subseteq X^N \end{equation}