projection

concept in relational algebra

Projection or projections may refer to: ==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 from a vector space to itself such that 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 Vector projection, orthogonal projection of a vector onto a straight line Projection (relational algebra) , 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 ==Arts and entertainment== Projection (architecture), an architectural element that protrudes beyond the surface of the wall "Projections" (Star Trek: Voyager), an episode of the television series Star Trek: Voyager Projections (The Blues Project album), 1966 Projections (John Handy album), 1968 Projections (film), 2013 Croatian film ==Other uses== Projection (alchemy), process in Alchemy 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== Project (disambiguation) Projection effect (disambiguation) Projector (disambiguation) Projective (disambiguation)

Structured factual content from Wikidata, released under CC0.