Definition:Mapping/Also known as

Definition
Words which are often used to mean the same thing as mapping include:
 * transformation (particularly in the context of self-maps)
 * operator
 * function (usually in the context of numbers)
 * map (but this term is discouraged, as the term is also used by some writers for planar graph).

Some sources introduce the concept with informal words such as rule or idea or mathematical notion.

Sources defining a mapping (function) to be only a many-to-one relation refer to a mapping (function) as a total mapping (total function).

The wording can vary.

A mapping $f$ from $S$ to $T$ is also described as a mapping on $S$ into $T$.