binary relation

Noun

 * 1)  A subset of the Cartesian product A×A (the set of ordered pairs (a, b) of elements of A).
 * 2)  A subset of the Cartesian product A×B.
 * 1)  A subset of the Cartesian product A×B.
 * 1)  A subset of the Cartesian product A×B.
 * 1)  A subset of the Cartesian product A×B.

Usage notes

 * If $$R$$ is a relation between $$A$$ and $$B$$, then $$A$$ is called the domain of the relation, and $$B$$ is called the codomain of the relation.
 * For a binary relation $$R$$, the notation $$a R b$$ signifies that $$(a,b) \in R$$, and one may say that $$a$$ is in binary relation $$R$$ to $$b$$.

Translations

 * Czech: binární relace
 * Finnish: binäärirelaatio
 * French: relation binaire
 * Hungarian:
 * Icelandic: tvístæð vensl
 * Italian: relazione binaria
 * Japanese:
 * Romanian:
 * Spanish: relación binaria