fact: Definition to_terminal `{@IsTerminalCategory one H1 H2} (F G : Functor C one) : NaturalTransformation F G := Build_NaturalTransformation F G (fun x => center _) (fun _ _ _ => path_contr _ _).
imports: Category.Core Functor.Core NaturalTransformation.Core NaturalTransformation.Paths InitialTerminalCategory.Core InitialTerminalCategory.Functors Contractible