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Theorems · Definition · algebraic geometry

AlgebraicGeometry.Scheme.OpenCover.finiteSubcover

{X : AlgebraicGeometry.Scheme} → X.OpenCover → [H : CompactSpace ↥X] → X.OpenCover

Every open cover of a quasi-compact scheme can be refined into a finite subcover.

Defined in
Mathlib.AlgebraicGeometry.Cover.Open
Cited by
11 results in Mathlib
Foundations
Depth 109 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
CompactSpace

Around this declaration

Dashed lines are statement dependencies; solid lines are citations in proofs.

AlgebraicGeometry.Scheme.Hom.support_ker · cited by 6Hom.support_kerAlgebraicGeometry.Scheme.exists_hom_comp_eq_comp_of_locallyOfFiniteType · cited by 2Scheme.exists_hom_comp_eq…AlgebraicGeometry.compactSpace_iff_exists · cited by 2AlgebraicGeometry.compact…AlgebraicGeometry.Scheme.nonempty_of_isLimit · cited by 1Scheme.nonempty_of_isLimitAlgebraicGeometry.Scheme.exists_hom_isAffine_of_isZariskiLocalAtSource · cited by 1Scheme.exists_hom_isAffin…AlgebraicGeometry.Flat.isQuotientMap_of_surjective · cited by 1Flat.isQuotientMap_of_sur…AlgebraicGeometry.Scheme.Hom.isLocallyConstructible_image · cited by 1Hom.isLocallyConstructibl…AlgebraicGeometry.stalkMap_injective_of_isOpenMap_of_injective · cited by 0AlgebraicGeometry.stalkMa…AlgebraicGeometry.pointsPi_surjective · cited by 0AlgebraicGeometry.pointsP…AlgebraicGeometry.Scheme.OpenCover.finiteSubcover_X · cited by 0OpenCover.finiteSubcover_XAlgebraicGeometry.Scheme.OpenCover.finiteSubcover_f · cited by 0OpenCover.finiteSubcover_fDFunLike.coe · cited by 62936DFunLike.coeFinset · cited by 13712FinsetTop.top · cited by 9680Top.topSet.range · cited by 4705Set.rangeCategoryTheory.ConcreteCategory.hom · cited by 4022ConcreteCategory.homTopCat.carrier · cited by 3184TopCat.carrierAlgebraicGeometry.Scheme · cited by 2540AlgebraicGeometry.SchemeSet.iUnion · cited by 2483Set.iUnionCommRingCat · cited by 2333CommRingCatAlgebraicGeometry.PresheafedSpace.carrier · cited by 2020PresheafedSpace.carrierAlgebraicGeometry.SheafedSpace.toPresheafedSpace · cited by 1988SheafedSpace.toPresheafed…AlgebraicGeometry.LocallyRingedSpace.toSheafedSpace · cited by 1892LocallyRingedSpace.toShea…AlgebraicGeometry.Scheme.toLocallyRingedSpace · cited by 1734Scheme.toLocallyRingedSpa…AlgebraicGeometry.PresheafedSpace.Hom.base · cited by 1135Hom.baseAlgebraicGeometry.LocallyRingedSpace.Hom.toHom · cited by 995Hom.toHomOpenCover.finiteSubcoverCITED BYCITES

Cites22

Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.

Cited by11

Results whose statement or proof uses this declaration.