fact: Definition is_ptd_mor {F G : ptd_obj}(α: F ⟹ G) : UU := ∏ c : C, ptd_pt F c · α c = ptd_pt G c.
imports: UniMath.Foundations.PartD UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.FunctorCategory