Identity may refer to: * Identity document * Identity (philosophy) * Identity (social science) *

Identity (mathematics) In mathematics, an identity is an equality relating one mathematical expression ''A'' to another mathematical expression ''B'', such that ''A'' and ''B'' (which might contain some variables) produce the same value for all values of t ...

Arts and entertainment

Film and television

* ''Identity'' (1987 film), an Iranian film * ''Identity'' (2003 film), an American slasher film * ''Identity'' (game show), an American game show * ''Identity'' (TV series), a British police procedural drama television series * "Identity" (''Arrow''), a 2013 episode * "Identity" (''Burn Notice''), a 2007 episode * "Identity" (''Charlie Jade''), a 2005 episode * "Identity" (''Legend of the Seeker''), a 2008 episode * "Identity" (''Law & Order: Special Victims Unit'' episode), 2005 * "Identity" (''NCIS: Los Angeles''), a 2009 pilot episode

Music

Albums

* ''Identity'' (3T album), 2004 * ''Identity'' (BoA album), 2010 * ''Identity'' (Far East Movement album), 2016 * ''Identity'' (Robert Pierre album), 2008 * ''Identity'' (Raghav album), 2008 * ''Identity'' (Victon EP), 2017 * ''Identity'' (Zee album), 1984

Songs

* "Identity" (Sakanaction song), 2010 * "Identity" (X-Ray Spex song), 1978 * "Identity", a 1983 song by Bucks Fizz, B-side to " London Town"

Other uses in music

Identity (music) In post-tonal music theory, identity is similar to identity in universal algebra. An identity function is a permutation or transformation which transforms a pitch or pitch class set into itself. Generally this requires symmetry. For instance ...

, in post-tonal music theory *

Identity (tuning) In music theory, limit or harmonic limit is a way of characterizing the harmony found in a piece or genre of music, or the harmonies that can be made using a particular scale. The term ''limit'' was introduced by Harry Partch, who used it to give ...

, an odd member below and including a limit

Publications

* ''Identity'', a defunct quarterly Australian magazine published by the

Aboriginal Publications Foundation The Aboriginal Publications Foundation (APF) was a national Australian Aboriginal organisation that existed from 1970 to 1982, based first in Sydney, New South Wales, and later in Perth, Western Australia. It existed to promote and fund creative ...

(1971–1982) * ''Identity'' (novel), by Milan Kundera, 1998

Business

Accounting identity In accounting, finance and economics, an accounting identity is an equality that must be true regardless of the value of its variables, or a statement that by definition (or construction) must be true. Where an accounting identity applies, any dev ...

, calculation that must be true regardless of its variables *

Brand identity A brand is a name, term, design, symbol or any other feature that distinguishes one seller's good or service from those of other sellers. Brands are used in business, marketing, and advertising for recognition and, importantly, to create a ...

, the expression of a brand *

Corporate identity A corporate identity or corporate image is the manner in which a corporation, firm or business enterprise presents itself to the public (such as customers and investors as well as employees). The corporate identity is typically visualized by ...

, the manner a corporation presents itself to the public

Philosophy and social science

* Identity (philosophy), the relation each thing bears only to itself *

Law of identity In logic, the law of identity states that each thing is identical with itself. It is the first of the historical three laws of thought, along with the law of noncontradiction, and the law of excluded middle. However, few systems of logic are bui ...

, that each thing is identical with itself *

Personal identity Personal identity is the unique numerical identity of a person over time. Discussions regarding personal identity typically aim to determine the necessary and sufficient conditions under which a person at one time and a person at another time ca ...

, the numerical identity of a person over time * Identity (social science), qualities etc that characterize a person or group

Science

Digital identity A digital identity is information used by computer systems to represent an external agent – a person, organization, application, or device. Digital identities allow access to services provided with computers to be automated and make it possibl ...

, information used by computer systems to represent an external agent *

Identity (object-oriented programming) In object-oriented programming, object-oriented design and object-oriented analysis, the identity of an object is its being distinct from any other object, regardless of the values of the objects' properties. Having identity is a fundamental prope ...

, the property of objects that distinguishes them from other objects *

, an equality that holds regardless of the values of its variables *

Identity element In mathematics, an identity element, or neutral element, of a binary operation operating on a set is an element of the set that leaves unchanged every element of the set when the operation is applied. This concept is used in algebraic structures su ...

, an element of the set which leaves unchanged every element when the operation is applied *

Identity function Graph of the identity function on the real numbers In mathematics, an identity function, also called an identity relation, identity map or identity transformation, is a function that always returns the value that was used as its argument, un ...

, a function that leaves its argument unchanged * Identity matrix, with ones on the main diagonal, zeros elsewhere

Other uses

* Identity document, or ID