Mathlib Map

Theorems · Theorem · category theory

CategoryTheory.Functor.ReflectsEpimorphisms.reflects

∀ {C : Type u₁} {inst : CategoryTheory.Category.{v₁, u₁} C} {D : Type u₂} {inst_1 : CategoryTheory.Category.{v₂, u₂} D}
  {F : CategoryTheory.Functor C D} [self : F.ReflectsEpimorphisms] {X Y : C} (f : X ⟶ Y),
  CategoryTheory.Epi (F.map f) → CategoryTheory.Epi f

A functor reflects epimorphisms if morphisms that are mapped to epimorphisms are themselves epimorphisms.

Defined in
Mathlib.CategoryTheory.Functor.EpiMono
Cited by
1 results in Mathlib
Foundations
Depth 4 from the axioms · uses no axioms
Assumes
CategoryTheory.Functor.ReflectsEpimorphisms

Around this declaration

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

Cites7

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

Cited by1

Results whose statement or proof uses this declaration.