Relation or relations may refer to:
General uses
*
International relations
International relations (IR), sometimes referred to as international studies and international affairs, is the scientific study of interactions between sovereign states. In a broader sense, it concerns all activities between states—such as ...
, the study of interconnection of politics, economics, and law on a global level
*
Interpersonal relationship
The concept of interpersonal relationship involves social associations, connections, or affiliations between two or more people. Interpersonal relationships vary in their degree of intimacy or self-disclosure, but also in their duration, in t ...
, association or acquaintance between two or more people
*
Public relations
Public relations (PR) is the practice of managing and disseminating information from an individual or an organization (such as a business, government agency, or a nonprofit organization) to the public in order to influence their perception. P ...
, managing the spread of information to the public
*Sexual relations, or
human sexual activity
*
Social relation
A social relation or also described as a social interaction or social experience is the fundamental unit of analysis within the social sciences, and describes any voluntary or involuntary interpersonal relationship between two or more individuals ...
, in social science, any social interaction between two or more individuals
Logic and philosophy
*
Relation (philosophy)
Relations are ways in which things, the relata, stand to each other. Relations are in many ways similar to properties in that both characterize the things they apply to. Properties are sometimes treated as a special case of relations involving only ...
, 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)
*
Binary relation
In mathematics, a binary relation associates elements of one set, called the ''domain'', with elements of another set, called the ''codomain''. A binary relation over Set (mathematics), sets and is a new set of ordered pairs consisting of ele ...
(or correspondence, dyadic relation, or 2-place relation)
*
Equivalence relation
In mathematics, an equivalence relation is a binary relation that is reflexive, symmetric and transitive. The equipollence relation between line segments in geometry is a common example of an equivalence relation.
Each equivalence relation ...
*
Homogeneous relation
*
Reflexive relation
*
Serial relation
*
Ternary relation
In mathematics, a ternary relation or triadic relation is a finitary relation in which the number of places in the relation is three. Ternary relations may also be referred to as 3-adic, 3-ary, 3-dimensional, or 3-place.
Just as a binary relation ...
(or triadic, 3-adic, 3-ary, 3-dimensional, or 3-place relation)
Relation may also refer to:
*
Directed relation
In computer science, confluence is a property of rewriting systems, describing which terms in such a system can be rewritten in more than one way, to yield the same result. This article describes the properties in the most abstract setting of an a ...
*
Relation algebra
In mathematics and abstract algebra, a relation algebra is a residuated Boolean algebra expanded with an involution called converse, a unary operation. The motivating example of a relation algebra is the algebra 2''X''² of all binary relations ...
, an algebraic structure inspired by algebraic logic
Databases and ontology
*
Relational model
The relational model (RM) is an approach to managing data using a Structure (mathematical logic), structure and language consistent with first-order logic, first-order predicate logic, first described in 1969 by English computer scientist Edgar F. ...
, an approach to managing data
**
Relation (database), a component of a relational database
**
Relational algebra
**
Relational calculus
The relational calculus consists of two calculi, the tuple relational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. The raison d'être ...
**
Relational database
A relational database is a (most commonly digital) database based on the relational model of data, as proposed by E. F. Codd in 1970. A system used to maintain relational databases is a relational database management system (RDBMS). Many relatio ...
, 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'' (1982 film), a 1982 Japanese short experimental film
*
''Relations'' (album), a 2004 album of cover versions by Kathryn Williams
See also
*
Relate (disambiguation)
*
Relationism (disambiguation)
*
Relationship (disambiguation)
**
Kinship
In anthropology, kinship is the web of social relationships that form an important part of the lives of all humans in all societies, although its exact meanings even within this discipline are often debated. Anthropologist Robin Fox says that ...
, in anthropology and generally, the web of human social relationships, or an affinity between entities because of some characteristics
**
Coefficient of relationship in biology
*
Relative (disambiguation)
Relative may refer to:
General use
*Kinship and family, the principle binding the most basic social units society. If two people are connected by circumstances of birth, they are said to be ''relatives''
Philosophy
*Relativism, the concept that ...
*
Relativism
*
Relativity (disambiguation)
Relativity may refer to:
Physics
* Galilean relativity, Galileo's conception of relativity
* Numerical relativity, a subfield of computational physics that aims to establish numerical solutions to Einstein's field equations in general relativity ...
*
*
{{Disambiguation