Lemma 29.36.16. A morphism is étale at a point if and only if it is flat and G-unramified at that point. A morphism is étale if and only if it is flat and G-unramified.
Lemma 29.36.16. A morphism is étale at a point if and only if it is flat and G-unramified at that point. A morphism is étale if and only if it is flat and G-unramified.
Proof. This is clear from Lemmas 29.36.15 and 29.35.14. $\square$
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