(* universe_* raise BadConstraints if the second arg. is an inferred universe *)
val universe_eq: NCic.universe -> NCic.universe -> bool
val universe_leq: NCic.universe -> NCic.universe -> bool
(* universe_* raise BadConstraints if the second arg. is an inferred universe *)
val universe_eq: NCic.universe -> NCic.universe -> bool
val universe_leq: NCic.universe -> NCic.universe -> bool