What is the meaning of Injective?

Of, relating to, or being an injection: such that each element of the image (or range) is associated with at most one element of the preimage (or domain); inverse-deterministic

Loosely, having a certain generalizing property, abstracted from the study of as a -module. Formally, such that any short exact sequence of (left) -modules beginning with splits, or any of several equivalent statements: See Injective module.

Loosely, having a property analogous to that which characterizes injective modules (see above). Formally, such that, given a monomorphism in , for every morphism there exists a morphism such that ; see Injective object.

Such that the objects (usually modules) involved in the resolution are injective (in the algebraic senses above).

feminine singular of injectif

Source: wiktionary.org