fact: Definition idtoiso_compose C D (F F' F'' : Functor C D) (T' : F' = F'') (T : F = F') : ((Category.Morphisms.idtoiso (_ -> _) T' : morphism _ _ _) o (Category.Morphisms.idtoiso (_ -> _) T : morphism _ _ _))%natural_transformation = (Category.Morphisms.idtoiso (_ -> _) (T @ T')%path : morphism _ _ _).
imports: Category.Core Functor.Core NaturalTransformation.Core NaturalTransformation.Composition.Core Functor.Composition.Core Category.Morphisms FunctorCategory.Core NaturalTransformation.Paths Basics.Tactics