fact: Definition composition_tapp {x y z : C} (g : tlist hom y z) (f : tlist hom x y) : composition (f +++ g) ≈ composition g ∘ composition f.
imports: Category.Lib Category.Lib.TList Category.Theory.Category Category.Theory.Isomorphism Category.Theory.Functor Category.Theory.Adjunction Category.Instance.Sets