Injective function

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Notion

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Science and technology

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What Wikipedia says

In mathematics, an injective function (also known as injection, or one-to-one function) is a function f that maps distinct elements of its domain to distinct elements of its codomain; that is, x1 ≠ x2 implies f(x1) ≠ f(x2) (equivalently by contraposition, f(x1) = f(x2) implies x1 = x2).

Excerpt from the Wikipedia article “Injective function”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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