Relation

Relation or relations may refer to:

General uses

 * International relations, the study of interconnection of politics, economics, and law on a global level
 * Interpersonal relationship, association or acquaintance between two or more people
 * Public relations, managing the spread of information to the public
 * Sexual relations, or human sexual activity
 * Social relation, in social science, any social interaction between two or more individuals

Logic and philosophy

 * Relation (philosophy), links between properties of an object
 * Relational theory, framework to understand reality or a physical system

Mathematics
A finitary or n-ary relation is a set of n-tuples. Specific types of relations include:
 * Relation (mathematics) (an elementary treatment of binary relations)
 * Binary relation (or diadic relation – a more in-depth treatment of binary relations)
 * Equivalence relation
 * Homogeneous relation
 * Reflexive relation
 * Serial relation
 * Ternary relation (or triadic, 3-adic, 3-ary relation)

Relation may also refer to:
 * Directed relation
 * Relation algebra, an algebraic structure inspired by algebraic logic

Databases and ontology

 * Relational model, an approach to managing data
 * Relation (database), a component of a relational database
 * Relational algebra
 * Relational calculus
 * Relational database, a digital database
 * Relationships (also known as relations), one of the ontology components

Art and literature

 * Relation aller Fürnemmen und gedenckwürdigen Historien, the first newspaper
 * Relation (film), a 1982 Japanese experimental short film by Toshio Matsumoto
 * Relations (album), a 2004 album of cover versions by Kathryn Williams