English
For arrows f,g with Image, F,G : ImageMap sq, F.map = G.map.
Русский
Для стрелок f,g с образами, при F,G : ImageMap sq, сопоставления карт одинаковы: F.map = G.map.
LaTeX
$$$ F.map = G.map $$$
Lean4
instance (priority := 100) hasImageMapOfIsIso {f g : Arrow C} [HasImage f.hom] [HasImage g.hom] (sq : f ⟶ g)
[IsIso sq] : HasImageMap sq :=
HasImageMap.mk
{ map := image.lift ((Image.monoFactorisation g.hom).ofArrowIso (inv sq))
map_ι := by
erw [← cancel_mono (inv sq).right, Category.assoc, ← MonoFactorisation.ofArrowIso_m, image.lift_fac,
Category.assoc, ← Comma.comp_right, IsIso.hom_inv_id, Comma.id_right, Category.comp_id] }