fact: Definition arrow_mor_mor_assoc {C:category} {c c' c'':C} {X:[C^op,HSET]} (g:c''-->c') (f:c'-->c) (x:c⇒X) : x ⟲ (f ∘ g) = (x ⟲ f) ⟲ g := eqtohomot (functor_comp X f g) x.
imports: UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.yoneda UniMath.CategoryTheory.Categories.HSET.Core UniMath.CategoryTheory.Categories.HSET.MonoEpiIso UniMath.Foundations.Preamble UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics