Substitution

Substitution may refer to:

Arts and media

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

Music

 * Chord substitution, swapping one chord for a related one within a chord progression
 * 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), a 2009 song by Silversun Pickups
 * "Substitution" (Purple Disco Machine and Kungs song), a 2023 song by Purple Disco Machine and Kungs

Biology and chemistry

 * Base-pair substitution or point mutation, a type of mutation
 * Substitution reaction, where a functional group in a chemical compound is replaced by another group
 * Substitution, a process in which an allele arises and undergoes fixation

Mathematics and computing

 * Substitution (algebra), replacing occurrences of some symbol by a given value
 * Substitution (logic), a syntactic transformation on strings of symbols of a formal language
 * 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
 * Substitution cipher, a method of encryption
 * Integration by substitution, a method for finding antiderivatives and integrals

Other uses in science

 * Substitution (economics), switching between alternative consumable goods as their relative prices change
 * Attribute substitution, a psychological process thought to underlie a number of cognitive biases and perceptual illusions
 * Substitution method, a method of measuring the transmission loss of an optical fiber

Other uses

 * Substitution (law), the replacement of a judge
 * Substitution (sport), where a sports team is able to change one player for another during a match

Within Wikipedia

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