The Stacks project

Lemma 74.19.3. The property $\mathcal{P}(f)=$“$f$ is unramified” is étale local on the source.

Proof. Follows from Lemma 74.14.3 using Morphisms of Spaces, Definition 67.38.1 and Descent, Lemma 35.31.3. $\square$

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