fact: Definition slice_category_over_induced_functor a a' (m : morphism C a a') : Functor (C / a) (C / a') := Eval hnf in slice_category_morphism_induced_functor _ _ _ m.
imports: Category.Core Functor.Core NaturalTransformation.Core Category.Dual Category.Prod NaturalTransformation.Identity FunctorCategory.Core Cat.Core InitialTerminalCategory.Core InitialTerminalCategory.Functors HoTT.Tactics Basics.Tactics