Identity (disambiguation)
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- In mathematics, the term identity, in distinction to an equation, refers to a equational statement that always holds. Most commonly identities in this sense are used in universal algebra to define a certain class of structures. In another popular usage, an identity is considered as a mathematical entity that does not change other objects. In this spirit, one talks about identity functions, identity elements, identity matrices, identity relations, and identity morphisms.
- In philosophy, identity has both metaphysical and logical uses.
- Digital identity refers to the representation of identity in terms of digital information. A digital identity can be understood as the set of digital information that is attributable to any given entity. This entity may be human (an individual or a community), a physical object, or even digital information itself.
- In object-oriented programming, identity (object-oriented programming) describes a property of objects that allows those objects to be distinguished from each other.
- In the social sciences, identity has specific meanings, stemming from cognitive theory, sociology, politics, and psychology. See identity (social science).
- For security systems, authentication identity refers to the characteristics that a person has that can be verified.
- In philosophy of mind the identity theory of mind holds that the mind is identical to the brain.
- In music, identity (music) is used in a similar sense as the universal algebra above.
- For the periodical publication "Identity", see Identity (magazine).
- Identity is a movie starring John Cusack.
- Identity is a novel written by Milan Kundera.
- Identity may be short for identity document