Mathlib Map

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.

Defined in
Mathlib.CategoryTheory.Limits.Shapes.Kernels
Cited by
24 results in Mathlib
Foundations
Depth 31 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
CategoryTheory.CategoryCategoryTheory.Limits.HasZeroMorphismsCategoryTheory.Limits.HasKernel

Around this declaration

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

CategoryTheory.Limits.kernel.lift · cited by 64kernel.liftCategoryTheory.Limits.kernel.lift_ι · cited by 55kernel.lift_ιCategoryTheory.kernelCokernelCompSequence.snakeInput · cited by 31kernelCokernelCompSequenc…CategoryTheory.Abelian.SpectralObject.rightHomologyDataShortComplex · cited by 7SpectralObject.rightHomol…CategoryTheory.ShortComplex.exact_kernel · cited by 7ShortComplex.exact_kernelCategoryTheory.ShortComplex.LeftHomologyData.ofHasKernelOfHasCokernel · cited by 5LeftHomologyData.ofHasKer…CategoryTheory.ShortComplex.RightHomologyData.ofHasCokernelOfHasKernel · cited by 5RightHomologyData.ofHasCo…CategoryTheory.ShortComplex.RightHomologyData.ofHasKernel · cited by 5RightHomologyData.ofHasKe…CategoryTheory.Functor.preservesFiniteLimits_tfae · cited by 5Functor.preservesFiniteLi…CategoryTheory.ShortComplex.LeftHomologyData.ofAbelian · cited by 4LeftHomologyData.ofAbelianCategoryTheory.ObjectProperty.SerreClassLocalization.preservesKernel · cited by 3SerreClassLocalization.pr…CategoryTheory.Abelian.epiWithInjectiveKernel_iff · cited by 3Abelian.epiWithInjectiveK…CategoryTheory.ComposableArrows.Exact.cokerIsoKer · cited by 3Exact.cokerIsoKerCategoryTheory.Limits.isLimitOfHasKernelOfPreservesLimit · cited by 3Limits.isLimitOfHasKernel…CategoryTheory.ComposableArrows.IsComplex.cokerToKer · cited by 3IsComplex.cokerToKerCategoryTheory.Category · cited by 32673CategoryTheory.CategoryQuiver.Hom · cited by 32603Quiver.HomCategoryTheory.CategoryStruct.comp · cited by 17999CategoryStruct.compCategoryTheory.Limits.HasZeroMorphisms · cited by 3275Limits.HasZeroMorphismsCategoryTheory.Limits.Cone.pt · cited by 1298Cone.ptCategoryTheory.Limits.WalkingParallelPair · cited by 781Limits.WalkingParallelPairCategoryTheory.Limits.parallelPair · cited by 766Limits.parallelPairCategoryTheory.Iso.refl · cited by 727Iso.reflCategoryTheory.Limits.IsLimit · cited by 664Limits.IsLimitCategoryTheory.Limits.comp_zero · cited by 365Limits.comp_zeroCategoryTheory.Limits.kernel · cited by 272Limits.kernelCategoryTheory.Limits.kernel.ι · cited by 214kernel.ιCategoryTheory.Limits.HasKernel · cited by 169Limits.HasKernelCategoryTheory.Limits.limit.isLimit · cited by 146limit.isLimitCategoryTheory.Limits.limit.cone · cited by 97limit.coneLimits.kernelIsKernelCITED BYCITES

Cites19

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

Cited by38

Results whose statement or proof uses this declaration.