Definition 37.64.1. A morphism of schemes $X \to Y$ is weakly étale or absolutely flat if both $X \to Y$ and the diagonal morphism $X \to X \times _ Y X$ are flat.
Definition 37.64.1. A morphism of schemes $X \to Y$ is weakly étale or absolutely flat if both $X \to Y$ and the diagonal morphism $X \to X \times _ Y X$ are flat.
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