Lemma 29.32.10. Let X \to S be a morphism of schemes. Let g : S' \to S be a morphism of schemes. Let X' = X_{S'} be the base change of X. Denote g' : X' \to X the projection. Then the map
(g')^*\Omega _{X/S} \to \Omega _{X'/S'}
of Lemma 29.32.8 is an isomorphism.
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