Definitions

1. adjective

A function or mapping that assigns to each element in its domain exactly one element in its range, such that no two different elements in the domain have the same element in the range.

“The function f(x) = x^2 is injective on the set of positive real numbers.”

2. noun

A function or mapping that is injective.

“The injective function is a key concept in linear algebra.”

3. adjective

Used to describe a function or mapping that is injective.

“This injective map between the two sets is a bijection.”