Editing Binary function (section)

==Generalisations to ternary and other functions==
{{see also|Multivariate function}}
The concept of binary function generalises to ''ternary'' (or ''3-ary'') ''function'', ''quaternary'' (or ''4-ary'') ''function'', or more generally to ''n-ary function'' for any [[natural number]] ''n''.
A ''0-ary function'' to ''Z'' is simply given by an element of ''Z''.
One can also define an ''A-ary function'' where ''A'' is any [[Set (mathematics)|set]]; there is one input for each element of ''A''.