Substitution may refer to:

Arts and media

Substitution (poetry) In English poetry substitution, also known as inversion, is the use of an alien metric foot in a line of otherwise regular metrical pattern. For instance in an iambic line of "da DUM", a trochaic substitution would introduce a foot of "DUM&n ...

, a variation in poetic scansion * Substitution (theatre), an acting methodology

Music

Chord substitution In music theory, chord substitution is the technique of using a chord (music), chord in place of another in a progression of chords, or a chord progression. Much of the European classical repertoire and the vast majority of blues, jazz and rock ...

, swapping one chord for a related one within a chord progression *

Tritone substitution The tritone substitution is a common chord substitution found in both jazz and classical music. Where jazz is concerned, it was the precursor to more complex substitution patterns like Coltrane changes. Tritone substitutions are sometimes used ...

, 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), a 2009 song by Silversun Pickups * "Substitution" (Purple Disco Machine and Kungs song), a 2023 song by

Purple Disco Machine Tino Piontek (born 12 February 1980), better known by the stage name Purple Disco Machine, is a German nu-disco and house music record producer and Disc jockey, DJ. Early life and career Tino Piontek was born in Dresden on 12 February 1980, an ...

and

Kungs Valentin Brunel (; born 17 December 1996), better known by his stage name Kungs ( ), is a French DJ, record producer and musician. A native of Toulon, he released his first album ''Layers'' in 2016 after success with " This Girl", a collabo ...

Science and mathematics

Biology and chemistry

* Base-pair substitution or point mutation, a type of mutation *

Substitution reaction A substitution reaction (also known as single displacement reaction or single substitution reaction) is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group. Substitution reactions ar ...

, where a functional group in a chemical compound is replaced by another group **

Substituent In organic chemistry, a substituent is one or a group of atoms that replaces (one or more) atoms, thereby becoming a moiety in the resultant (new) molecule. The suffix ''-yl'' is used when naming organic compounds that contain a single bond r ...

, the atom or atoms that replaces those of the reactant *Substitution, a process in which an allele arises and undergoes fixation

Mathematics and computing

Substitution (algebra) A substitution is a syntactic transformation on formal expressions. To ''apply'' a substitution to an expression means to consistently replace its variable, or placeholder, symbols with other expressions. The resulting expression is called a ''s ...

, replacing occurrences of some symbol by a given value *

Substitution (logic) A substitution is a syntactic transformation on formal expressions. To ''apply'' a substitution to an expression means to consistently replace its variable, or placeholder, symbols with other expressions. The resulting expression is called a ''s ...

, a syntactic transformation on strings of symbols of a formal language *

String substitution In computer science, in the area of formal language theory, frequent use is made of a variety of string functions; however, the notation used is different from that used for computer programming, and some commonly used functions in the theoretical ...

, 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 In information theory, linguistics, and computer science, the Levenshtein distance is a string metric for measuring the difference between two sequences. The Levenshtein distance between two words is the minimum number of single-character edits (i ...

Substitution cipher In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, t ...

, a method of encryption *

Integration by substitution In calculus, integration by substitution, also known as ''u''-substitution, reverse chain rule or change of variables, is a method for evaluating integrals and antiderivatives. It is the counterpart to the chain rule for differentiation, and c ...

, a method for finding antiderivatives and integrals

Other uses in science

Substitution (economics) In microeconomics, substitute goods are two goods that can be used for the same purpose by consumers. That is, a consumer perceives both goods as similar or comparable, so that having more of one good causes the consumer to desire less of the other ...

, switching between alternative consumable goods as their relative prices change *

Attribute substitution Attribute substitution is a psychological process thought to underlie a number of cognitive biases and perceptual illusions. It occurs when an individual has to make a judgment (of a ''target attribute'') that is computationally complex, and ins ...

, a psychological process thought to underlie a number of cognitive biases and perceptual illusions *

Substitution method In optical fiber technology, the substitution method is a method of measuring the transmission loss of a fiber. It consists of: #using a stable optical source, at the wavelength of interest, to drive a mode scrambler, the output of which overfills ...

, a method of measuring the transmission loss of an optical fiber

Other uses

Substitution (law) In legal terms, the right of substitution is a statutory right of all parties except the state. It is the right to change the presiding court official with or without cause. Judges are usually given cases randomly within a jurisdiction (unless t ...

, the replacement of a judge *

Substitution (sport) In team sports, substitution (or interchange) is replacing one player with another during a match. Substitute players that are not in the starting lineup (also known as bench players, backups, interchange, or reserves) reside on the bench and are ...

, where a sports team is able to change one player for another during a match *

Substitution therapy Opioid use disorder (OUD) is a substance use disorder characterized by cravings for opioids, continued use despite physical and/or psychological deterioration, increased tolerance with use, and withdrawal symptoms after discontinuing opioids. ...

or opiate replacement therapy *

Import substitution industrialization Import substitution industrialization (ISI) is a protectionist trade and economics, economic policy that advocates replacing foreign imports with domestic production. It is based on the premise that a country should attempt to reduce its foreign ...

, a trade and economic policy *

Penal substitution Penal substitution, also called penal substitutionary atonement and especially in older writings forensic theory,Vincent Taylor (theologian), Vincent Taylor, ''The Cross of Christ'' (London: Macmillan & Co, 1956), pp. 71–72: '...the ''four main ...

, a theory of the atonement within Christian theology *

Simultaneous substitution Simultaneous substitution (also known as simsubbing or signal substitution) is a practice mandated by the Canadian Radio-television and Telecommunications Commission (CRTC) requiring pay television, broadcast distribution undertakings (BDUs) in ...

, 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