Editing Projection

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'''Projection''' or '''projections''' may refer to:
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== Physics ==
* [[Projection (physics)]], the action/process of light, heat, or sound reflecting from a surface to another in a different direction
* The display of images by a [[projector]]

==Optics, graphics, and cartography ==
* [[Map projection]], reducing the surface of a three-dimensional planet to a flat map 
* [[Graphical projection]], the production of a two-dimensional image of a three-dimensional object

==Chemistry==
* [[Fischer projection]], a two-dimensional representation of a three-dimensional organic molecule
* [[Haworth projection]], a way of writing a structural formula to represent the cyclic structure of monosaccharides 
* [[Natta projection]], a way to depict molecules with complete stereochemistry in two dimensions in a skeletal formula
* [[Newman projection]], a visual representation of a chemical bond from front to back

==Mathematics==
* [[Projection (mathematics)]], any of several different types of geometrical mappings
** [[Projection (linear algebra)]], a linear transformation {{mvar|P}} from a vector space to itself such that {{math|1=''P''<sup>2</sup> = ''P''}}
** [[Projection (set theory)]], one of two closely related types of functions or operations in set theory
** [[Projection (measure theory)]], use of a projection map in measure theory
** [[3D projection]], any method of mapping three-dimensional points to a two-dimensional plane
** [[Vector projection]], orthogonal projection of a vector onto a straight line
** [[Projection (relational algebra)]]<!-- This item used only in a very specialized area, thus, please, keep it at the end -->, a type of unary operation in relational algebra
* [[Projection method (fluid dynamics)]], means of numerically solving time-dependent incompressible fluid-flow problems

==Biology==
* [[Projection areas]], areas of the brain where sensory processing occurs
* [[Projection fiber]], in neuroscience, white matter fibers that connect the cortex to the lower parts of the brain or the spinal cord

== Linguistics ==
* [[Projection (linguistics)]], grammatical trait inheritance from a head to a phrasal category
* [[Projection principle]] in syntax
* Projection of [[presupposition]]s in linguistics

==Arts and entertainment==
* [[Projections (Star Trek: Voyager)|"Projections" (''Star Trek: Voyager'')]], an episode of the television series ''Star Trek: Voyager''
* [[Projections (The Blues Project album)|''Projections'' (The Blues Project album)]], 1966
* [[Projections (John Handy album)|''Projections'' (John Handy album)]], 1968
* [[Projections (film)|''Projections'' (film)]], 2013 Croatian film

==Other uses==
* [[Projection (alchemy)]], process in Alchemy
* [[Projections (journal)|''Projections'' (journal)]], an interdisciplinary academic journal related to cinema and visual media
* [[Power projection]], the capacity of a state to implement policy by means of force, or the threat thereof
* [[Psychological projection]], or "Freudian projection", a defense mechanism in which one attributes to others one's own unacceptable or unwanted attributes, thoughts, or emotions
*[[Social projection]], a cognitive bias that leads people to believe others are similar to themselves
* [[Forecasting]], making predictions of the future based on past and present data
* [[Population projection]], in the field of demography, an estimate of a future population

==See also==
* {{Look from}}
* {{In title}}
* [[Project (disambiguation)]]
* [[Projection effect (disambiguation)]]
* [[Projector (disambiguation)]]
* [[Projective (disambiguation)]]

{{Disambiguation}}