Commit 2023-03-13 14:02 5d323582

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feat: port CategoryTheory.Limits.Preserves.Shapes.Kernels (#2806)

Estimated changes

Modified Mathlib.lean

Created Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean

added def CategoryTheory.Limits.PreservesCokernel.iso

added theorem CategoryTheory.Limits.PreservesCokernel.iso_inv

added def CategoryTheory.Limits.PreservesCokernel.ofIsoComparison

added def CategoryTheory.Limits.PreservesKernel.iso

added theorem CategoryTheory.Limits.PreservesKernel.iso_hom

added def CategoryTheory.Limits.PreservesKernel.ofIsoComparison

added def CategoryTheory.Limits.isColimitCoforkMapOfIsColimit'

added def CategoryTheory.Limits.isColimitMapCoconeCoforkEquiv'

added def CategoryTheory.Limits.isColimitOfHasCokernelOfPreservesColimit

added def CategoryTheory.Limits.isLimitForkMapOfIsLimit'

added def CategoryTheory.Limits.isLimitMapConeForkEquiv'

added def CategoryTheory.Limits.isLimitOfHasKernelOfPreservesLimit

added theorem CategoryTheory.Limits.kernel_map_comp_preserves_kernel_iso_inv

added theorem CategoryTheory.Limits.preserves_cokernel_iso_comp_cokernel_map