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Theorems · Theorem · category theory

CategoryTheory.strongMono_of_strongMono

∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {R Q P : C} (f : P ⟶ Q) (g : Q ⟶ R)
  [CategoryTheory.StrongMono (CategoryTheory.CategoryStruct.comp f g)], CategoryTheory.StrongMono f

If f ≫ g is a strong monomorphism, then so is f.

Defined in
Mathlib.CategoryTheory.Limits.Shapes.StrongEpi
Cited by
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Foundations
Depth 11 from the axioms · uses propext, Classical.choice
Assumes
CategoryTheory.CategoryCategoryTheory.StrongMono

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