val print : Cudf.universe -> Stdlib.Format.formatter -> PSet.t list -> unitval of_disj : 'a -> 'b listval iter : 'a list -> ( 'a -> unit ) -> unitval fold : ( 'a -> 'b -> 'b ) -> 'a list -> 'b -> 'bval filter : ( 'a -> bool ) -> 'a list -> 'a listval exists : ( 'a -> bool ) -> 'a list -> boolval map : ( 'a -> 'b ) -> 'a list -> 'b list