C D (F : Functor C D) (G : Functor D C) (A : F -| G) (F' : Functor C D) (G' : Functor D C) (A' : F' -| G') (T : NaturalTransformation F' F) : NaturalTransformation G G' := (@left_morphism_of_nondep _ _ F^op G^op A^op F'^op G'^op A'^op T^op)^op.
Require Import Category.Core Functor.Core NaturalTransformation.Core. Require Import Functor.Identity Functor.Composition.Core. Require Import NaturalTransformation.Composition.Core NaturalTransformation.Composition.Laws. Require Import Functor.Dual NaturalTransformation.Dual. Require Import Adjoint.Core Adjoint.UnitCounit Adjoint.Dual.