Definition:Image (Relation Theory)/Mapping/Mapping

Definition
Let $f: S \to T$ be a mapping.



Also known as
Some sources refer to this as the direct image of a mapping, in order to differentiate it from an inverse image.

Rather than apply a mapping $f$ directly to a subset $A$, those sources often prefer to define the direct image mapping of $f$ as a separate concept in its own right.

Also seen is the term image set of mapping for $\Img f$.

Also see

 * Equivalence of Definitions of Image of Mapping


 * Definition:Domain of Mapping
 * Definition:Codomain of Mapping
 * Definition:Range


 * Definition:Preimage of Mapping (also known as an inverse image)