Editing Commutative algebra (section)

===Localization===
{{Main|Localization (algebra)}}

The [[localization (algebra)|localization]] is a formal way to introduce the "denominators" to a given ring or a module. That is, it introduces a new ring/module out of an existing one so that it consists of [[algebraic fraction|fractions]] 
:<math>\frac{m}{s}</math>.
where the [[denominator]]s ''s'' range in a given subset ''S'' of ''R''. The archetypal example is the construction of the ring '''Q''' of rational numbers from the ring '''Z''' of integers.