Theorems · Definition · category theory
CategoryTheory.Limits.kernelIsKernel
{C : Type u} →
[inst : CategoryTheory.Category.{v, u} C] →
[inst_1 : CategoryTheory.Limits.HasZeroMorphisms C] →
{X Y : C} →
(f : X ⟶ Y) →
[inst_2 : CategoryTheory.Limits.HasKernel f] →
CategoryTheory.Limits.IsLimit (CategoryTheory.Limits.Fork.ofι (CategoryTheory.Limits.kernel.ι f) ⋯)The kernel built from kernel.ι f is limiting.
- Cited by
- 24 results in Mathlib
- Foundations
- Depth 31 from the axioms · uses propext, Classical.choice, Quot.sound
Around this declaration
Dashed lines are statement dependencies; solid lines are citations in proofs.
Cites19
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- CategoryTheory.Categorystatement and proof · cited by 32,673
- Quiver.Homstatement and proof · cited by 32,603
- CategoryTheory.CategoryStruct.compstatement · cited by 17,999
- CategoryTheory.Limits.HasZeroMorphismsstatement and proof · cited by 3,275
- CategoryTheory.Limits.Cone.ptproof · cited by 1,298
- CategoryTheory.Limits.WalkingParallelPairstatement · cited by 781
- CategoryTheory.Limits.parallelPairstatement and proof · cited by 766
- CategoryTheory.Iso.reflproof · cited by 727
- CategoryTheory.Limits.IsLimitstatement · cited by 664
- CategoryTheory.Limits.comp_zerostatement · cited by 365
- CategoryTheory.Limits.kernelstatement · cited by 272
- CategoryTheory.Limits.kernel.ιstatement · cited by 214
Cited by38
Results whose statement or proof uses this declaration.
- CategoryTheory.Limits.kernel.liftproof · cited by 64
- CategoryTheory.Limits.kernel.lift_ιproof · cited by 55
- CategoryTheory.kernelCokernelCompSequence.snakeInputproof · cited by 31
- CategoryTheory.Abelian.SpectralObject.rightHomologyDataShortComplexproof · cited by 7
- CategoryTheory.ShortComplex.exact_kernelproof · cited by 7
- CategoryTheory.ShortComplex.LeftHomologyData.ofHasKernelOfHasCokernelproof · cited by 5
- CategoryTheory.ShortComplex.RightHomologyData.ofHasCokernelOfHasKernelproof · cited by 5
- CategoryTheory.ShortComplex.RightHomologyData.ofHasKernelproof · cited by 5
- CategoryTheory.Functor.preservesFiniteLimits_tfaeproof · cited by 5
- CategoryTheory.ShortComplex.LeftHomologyData.ofAbelianproof · cited by 4
- CategoryTheory.ObjectProperty.SerreClassLocalization.preservesKernelproof · cited by 3
- CategoryTheory.Abelian.epiWithInjectiveKernel_iffproof · cited by 3