proposition: Theorem split_comp {x y z w v u : C} (f : y ~> z) (h : x ~> y) (g : v ~> u) (i : w ~> v) : split f g ∘ split h i ≈ split (f ∘ h) (g ∘ i).
proof: Proof. unfork. Qed.
imports: Category.Lib Category.Theory.Category Category.Theory.Isomorphism Category.Structure.Terminal