Element of Localization of Module is Represented as Quotient over S
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Theorem
Let $A$ be a commutative ring with unity.
Let $S \subseteq A$ be a multiplicatively closed subset.
Let $S^{-1}A$ be the localization of $A$ at $S$.
Let $M$ be a $A$-module.
Let $\struct { S^{-1}M, \iota}$ be the localization of $M$ at $S$.
Let $x \in S^{-1}M$.
Then there exist $m \in M$ and $s \in S$ such that:
- $x = s^{-1} \map \iota m$
Proof
Recall that $S \subseteq \paren {S^{-1}A}^\times$ by Definition of Localization of Ring.
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