Mathlib Map

Structures · Geometry

AlgebraicGeometry.FormallyUnramified

A morphism of schemes f : X ⟶ Y is formally unramified if for each affine U ⊆ Y and V ⊆ f ⁻¹' U, The induced map Γ(Y, U) ⟶ Γ(X, V) is formally unramified. See FormallyUnramified.hom_ext and FormallyUnramified.of_hom_ext for the infinitesimal lifting criterion.

Defined in
Mathlib.AlgebraicGeometry.Morphisms.FormallyUnramified
Shape
One type argument · adds formallyUnramified_appLE

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