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The Stacks project

Lemma 7.15.2. Given a morphism of sites f : \mathcal{D} \to \mathcal{C} corresponding to the functor u : \mathcal{C} \to \mathcal{D} the pair of functors (f^{-1} = u_ s, f_* = u^ s) is a morphism of topoi.

Proof. This is obvious from Definition 7.14.1. \square


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