Index

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Index may refer to:

Arts, entertainment, and media

Fictional entities

Periodicals and news portals

Other arts, entertainment and media

Business enterprises and events

Finance

Places in the United States

Publishing and library studies

Science, technology, and mathematics

Computer science

Economics

Mathematics and statistics

  • Index, a number or other symbol that specifies an element of an indexed family or set
  • Index, an element of an index set
  • Index, the label of a summand in Σ-notation of a summation

Algebra

Analysis

  • Index, the winding number of an oriented closed curve on a surface relative to a point on that surface
  • Diversity index, a measure of distribution or variety in fields such as ecology or information science
  • Index of a vector field, an integer that helps to describe the behaviour of a vector field around an isolated zero

Number theory

Statistics

Other uses in science and technology

  • Dental indices, standardized scoring systems for tooth problems
  • Indexicality, in linguistics, the phenomenon of a sign pointing to some object in the context in which it occurs
  • Indexing (motion), in mechanical engineering and machining, movement to a precisely known location
  • Refractive index, a measurement of how light propagates through a material
  • Valve Index, a virtual reality headset

Other uses

See also