▾ Set of symbols
▾ Alphabet
▾ Deduction system
▾ Theory
▾ Zermelo-Fraenkel set theory
▾ Set
▾ Binary cartesian set product
▾ Binary relation
Maximal binary relation
Formulation 0
A D4: Binary relation $(X \times Y, R)$ is a maximal binary relation if and only if \begin{equation} R = X \times Y \end{equation}