Substitution

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Look up substitution in Wiktionary, the free dictionary.

Substitution is the replacement of one thing with another.

Example: "If the price for butter increases, I use margarine." In this case margarine is a substitute for butter.

It may also refer to:

[edit] Mathematics

• Substitution cipher, in cryptography
• Substitution property, in Equality (mathematics)#Some basic logical properties of equality
• Integration by substitution, in calculus
• String substitution, in theoretical computer science
• Variable substitution, in first-order logic
• The substitution method of solving simultaneous equations

[edit] Sciences

• Substitution method, in the testing of optical fiber
• Substitution mutation, another name for a point mutation in genetics
• Substitution reaction, in chemistry
• Substitution therapy, to treat drug addiction; for opiates, see Opiate replacement therapy
• Substitution is a defence mechanism in analytical psychology where an emotion is substituted for another

[edit] Other uses

• Substitution (law), a legal right to change a judge that may be biased
• Substitution (theatre), an acting methodology
• Chord substitution, in music
• Import substitution industrialization, a trade and economic policy
• Simultaneous substitution, in Canadian broadcasting
• Substitutionary covenantal representation in Covenant theology

[edit] See also

• substitute (includes the meanings in sports)

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