injective Definition
a function that maps distinct elements of its domain to distinct elements of its codomain.
Using injective: Examples
Take a moment to familiarize yourself with how "injective" can be used in various situations through the following examples!
Example
The function f(x) = x^2 is not injective because f(-2) = f(2).
Example
The function g(x) = x + 1 is injective because different inputs always produce different outputs.
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Summary: injective in Brief
An 'injective' [ɪnˈdʒɛktɪv] function is one that maps distinct elements of its domain to distinct elements of its codomain. For example, the function g(x) = x + 1 is injective because different inputs always produce different outputs.
