# Substitution

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> Markdown URL: https://mediated.wiki/source/Substitution.md
> Source: https://en.wikipedia.org/wiki/Substitution
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> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

For the guide to the substitution of templates on Wikipedia, see Help:Substitution.

**Substitution** may refer to:

## Arts and media

- [Substitution (poetry)](/source/Substitution_(poetry)), a variation in poetic scansion
- [Substitution (theatre)](/source/Substitution_(theatre)), an acting methodology

### Music

- [Chord substitution](/source/Chord_substitution), swapping one chord for a related one within a chord progression
- [Tritone substitution](/source/Tritone_substitution), reinterpreting a chord via a new root note located an augmented fourth or diminished fifth distant from the root of the original interpretation
- ["Substitution" (Silversun Pickups song)](/source/Substitution_(Silversun_Pickups_song)), 2009
- ["Substitution" (Purple Disco Machine and Kungs song)](/source/Substitution_(Purple_Disco_Machine_and_Kungs_song)), 2023

## Science and mathematics

### Biology and chemistry

- [Base-pair substitution](/source/Base-pair_substitution) or point mutation, a type of mutation
- [Substitution reaction](/source/Substitution_reaction), where a functional group in a chemical compound is replaced by another group - [Substituent](/source/Substituent), the atom or atoms that replaces those of the reactant
- Substitution, a process in which an allele arises and undergoes [fixation](/source/Fixation_(population_genetics))

### Mathematics and computing

- [Substitution (algebra)](/source/Substitution_(algebra)), replacing occurrences of some symbol by a given value
- [Substitution (logic)](/source/Substitution_(logic)), a syntactic transformation on strings of symbols of a formal language
- [String substitution](/source/String_substitution), a mapping of letters in an alphabet to languages
- Substitution of a character in a string, one of the single-character edits used to define the [Levenshtein distance](/source/Levenshtein_distance)
- [Substitution cipher](/source/Substitution_cipher), a method of encryption
- [Integration by substitution](/source/Integration_by_substitution), a method for finding antiderivatives and integrals

### Other uses in science

- [Substitution (economics)](/source/Substitution_(economics)), switching between alternative consumable goods as their relative prices change
- [Attribute substitution](/source/Attribute_substitution), a psychological process thought to underlie a number of cognitive biases and perceptual illusions
- [Substitution method](/source/Substitution_method_(optical_fiber)), a method of measuring the transmission loss of an optical fiber

## Other uses

- [Substitution (law)](/source/Substitution_(law)), the replacement of a judge
- [Substitution (sport)](/source/Substitution_(sport)), where a sports team is able to change one player for another during a match
- [Substitution therapy](/source/Substitution_therapy) or opiate replacement therapy
- [Import substitution industrialization](/source/Import_substitution_industrialization), a trade and economic policy
- [Penal substitution](/source/Penal_substitution), a theory of the atonement within Christian theology
- [Simultaneous substitution](/source/Simultaneous_substitution), a practice requiring Canadian television distribution companies to substitute a non-local station signal with the local signal

## Within Wikipedia

- Help:Substitution, help performing substitution on Wikipedia pages
- Special:ExpandTemplates, page that shows what will result from substitution
- Wikipedia:Substitution, where, when, how, and what about using substitution on Wikipedia

## See also

- [Substitute (disambiguation)](/source/Substitute_(disambiguation))

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Adapted from the Wikipedia article [Substitution](https://en.wikipedia.org/wiki/Substitution) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Substitution?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.