Theorems · Definition · algebraic geometry
AlgebraicGeometry.Scheme.OpenCover.finiteSubcover
{X : AlgebraicGeometry.Scheme} → X.OpenCover → [H : CompactSpace ↥X] → X.OpenCoverEvery 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.
Cites22
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- DFunLike.coeproof · cited by 62,936
- Finsetproof · cited by 13,712
- Top.topproof · cited by 9,680
- Set.rangeproof · cited by 4,705
- CategoryTheory.ConcreteCategory.homproof · cited by 4,022
- TopCat.carrierstatement and proof · cited by 3,184
- AlgebraicGeometry.Schemestatement and proof · cited by 2,540
- Set.iUnionproof · cited by 2,483
- CommRingCatstatement · cited by 2,333
- AlgebraicGeometry.PresheafedSpace.carrierstatement and proof · cited by 2,020
- AlgebraicGeometry.SheafedSpace.toPresheafedSpacestatement and proof · cited by 1,988
- AlgebraicGeometry.LocallyRingedSpace.toSheafedSpacestatement and proof · cited by 1,892
Cited by11
Results whose statement or proof uses this declaration.
- AlgebraicGeometry.Scheme.Hom.support_kerproof · cited by 6
- AlgebraicGeometry.Scheme.exists_hom_comp_eq_comp_of_locallyOfFiniteTypeproof · cited by 2
- AlgebraicGeometry.compactSpace_iff_existsproof · cited by 2
- AlgebraicGeometry.Scheme.nonempty_of_isLimitproof · cited by 1
- AlgebraicGeometry.Scheme.exists_hom_isAffine_of_isZariskiLocalAtSourceproof · cited by 1
- AlgebraicGeometry.Flat.isQuotientMap_of_surjectiveproof · cited by 1
- AlgebraicGeometry.Scheme.Hom.isLocallyConstructible_imageproof · cited by 1
- AlgebraicGeometry.stalkMap_injective_of_isOpenMap_of_injectiveproof · cited by 0
- AlgebraicGeometry.pointsPi_surjectiveproof · cited by 0
- AlgebraicGeometry.Scheme.OpenCover.finiteSubcover_Xstatement and proof · cited by 0
- AlgebraicGeometry.Scheme.OpenCover.finiteSubcover_fstatement and proof · cited by 0