Theorems · Theorem · category theory

image_le_kernel

∀ {V : Type u} [inst : CategoryTheory.Category.{v, u} V] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms V] {A B C : V}
  (f : A ⟶ B) [inst_2 : CategoryTheory.Limits.HasImage f] (g : B ⟶ C) [inst_3 : CategoryTheory.Limits.HasKernel g],
  CategoryTheory.CategoryStruct.comp f g = 0 →
    CategoryTheory.Limits.imageSubobject f ≤ CategoryTheory.Limits.kernelSubobject g

Defined in

Mathlib.Algebra.Homology.ImageToKernel

Cited by

1 results in Mathlib

Foundations

Depth 43 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

CategoryTheory.CategoryCategoryTheory.Limits.HasZeroMorphismsCategoryTheory.Limits.HasImageCategoryTheory.Limits.HasKernel