val print : Cudf.universe -> Stdlib.Format.formatter -> PSet.t list -> unitval of_disj : 'a -> 'a 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