This article presents the generalized concept of a relation. For more basic presentations see the articles on
binary relations and
triadic relations. In mathematics, the concept of a relation or relationship is a generalization of
2-place relations, such as the relation of
equality, denoted by the sign "=" in a statement like "5 + 7 = 12," or the relation of
order, denoted by the sign "<" in a statement like "5 < 12". Relations that involve two places or roles are called
binary relations by some and dyadic relations by others, the latter being historically prior but also useful when necessary to avoid confusion with
binary (base 2) numerals.
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