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This category contains results about Functions.

The process which is symbolised by an operation is called a function.

The operand(s) of the operation can be considered to be the input(s).

The output of the function is whatever the operation is defined as doing with the operand(s).

A function is in fact another name for a mapping, but while the latter term is used in the general context of set theory and abstract algebra, the term function is generally reserved for mappings between sets of numbers.


This category has only the following subcategory.