# Inversion

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**Inversion** or **inversions** may refer to:

## Arts

- Inversion (artwork), a 2005 temporary sculpture in Houston, Texas
- Inversion (music), a term with various meanings in music theory and musical set theory
*Inversions*(novel) by Iain M. Banks*Inversion*(video game), a 2012 third person shooter for Xbox 360, PlayStation 3, and PC*Inversions*(EP), the 2014 extended play album by American rock music ensemble The Colourist*Inversion*(film), a 2016 Iranian film

## Natural sciences

### Biology and medicine

- Inversion (evolutionary biology), a hypothesis about the evolution of the dorsoventral axis in animals
- Inversion (kinesiology), movement of the sole towards the median plane
- Chromosomal inversion, where a segment of a chromosome is reversed end-to-end
- Inversion therapy, the practice of hanging upside down (heart higher than head) for supposed health benefits

### Geology

- Inversion (geology), the relative uplift of a previously basinal area resulting from local shortening, in structural geology
- Relief inversion, when a previous depression becomes a landform that stands out from its surroundings
- Seismic inversion, transforming seismic reflection data into a quantitative rock-property description of a geological formation

### Physics and chemistry

- Island of inversion, a group of elements with abnormal nuclear shell structure
- Nitrogen inversion, a chemical process in which a trigonal nitrogen-containing structure turns inside-out
- Population inversion, in statistical mechanics, when a system exists in state with more members in an excited state than in lower-energy states
- Pyramidal inversion, a chemical process in which a trigonal structure turns inside-out
- Sucrose inversion, a chemical reaction converting sucrose into glucose and fructose

### Other uses in the natural sciences

- Inverse problem, the process of calculating from a set of observations the causal factors that produced them
- Inversion (meteorology), air temperature increasing with height

## Computer science

- Priority inversion, the condition of a low-priority task holding a shared resource that a high-priority task needs

## Linguistics and language

- Inversion (linguistics), grammatical constructions where two expressions switch their order of appearance
- Inversion (prosody), the reversal of the order of a foot's elements in poetry
- Anastrophe, a figure of speech also known as an
*inversion*

## Mathematics and logic

- Involution (mathematics), a function that is its own inverse (when applied twice, the starting value is obtained).
- Inversion (discrete mathematics), any item that is out of order in a sequence
- Inverse element
- Circle inversion, a transformation of the Euclidean plane that maps generalized circles to generalized circles
- Inversion in a point, or point reflection, a kind of isometric (distance-preserving) transformation in a Euclidean space
- Inversion transformation, a conformal transformation (one which preserves angles of intersection)
- Method of inversion, the image of a harmonic function in a sphere (or plane); see Method of image charges
- Multiplicative inverse, the reciprocal of a number (or any other type of element for which a multiplication function is defined)
- Matrix inversion, an operation on a matrix that results in its multiplicative inverse (see also Matrix multiplication)
- Model inversion

## Other uses

- Inversion in postcolonial theory, a discursive strategy/gesture in cultural and subaltern studies
- Roller coaster inversion, which turns riders upside-down
- Corporate inversion, a form of tax avoidance by moving corporate ownership to low-tax nations

## See also

- Inverse (disambiguation)
- Inverter (disambiguation)
- Sexual inversion (disambiguation)
- Involution (disambiguation)
- Eversion (disambiguation)
- Reversal (disambiguation)

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