identity function
Sign in to saveAlso known as identity map, identity transformation, identity operator, id, identity relation
function that always returns the same value that was used as its argument
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- TeX string
- \operatorname{id}
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Graph of the identity function on the real numbers
In mathematics, an identity function, also called an identity relation, identity map or identity transformation, is a function that always returns the value that was used as its argument, unchanged. That is, when
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function
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complex analysis
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morphism
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mathematics
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International Standard Book Number
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integer
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set theory
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number theory
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real number
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set
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digital object identifier
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symmetry
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vector space
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polynomial
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sequence
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continuous function
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metric space
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inverse function
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graph of a function
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topological space
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