Remark 59.29.2. Since U and U' are étale over S, any S-morphism between them is also étale, see Proposition 59.26.2. In particular all morphisms of étale neighborhoods are étale.
Remark 59.29.2. Since U and U' are étale over S, any S-morphism between them is also étale, see Proposition 59.26.2. In particular all morphisms of étale neighborhoods are étale.
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