-(* terms **********************************************************************)
-
-(* FG: not needed for now
-(* nautral terms *)
-inductive neutral: T → Prop ≝
- | neutral_sort: ∀n.neutral (Sort n)
- | neutral_rel: ∀i.neutral (Rel i)
- | neutral_app: ∀M,N.neutral (App M N)
-.
-*)
-