NReference.reference -> NCic.context ->
NCic.term -> NCic.term -> NCic.term -> unit
+(* Functions to be used by the refiner *)
+val debruijn: NUri.uri -> int -> NCic.context -> NCic.term -> NCic.term
+val are_all_occurrences_positive:
+ subst:NCic.substitution ->
+ NCic.context -> NUri.uri -> int -> int -> int -> int -> NCic.term -> bool