Lemma 66.49.9. Let $S$ be a scheme. Let $X$ be a Nagata algebraic space over $S$. The normalization $\nu : X^\nu \to X$ is a finite morphism.

**Proof.**
Since $X$ being Nagata is locally Noetherian, Definition 66.49.6 applies. By construction of $X^\nu $ in Lemma 66.49.5 we immediately reduce to the case of schemes which is Morphisms, Lemma 29.54.10.
$\square$

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