(**************************************************************************)
include "ground_2/notation/constructors/nil_0.ma".
-include "ground_2/notation/constructors/cons_3.ma".
-include "ground_2/notation/functions/append_2.ma".
+include "ground_2/notation/constructors/oplusright_5.ma".
include "ground_2/lib/arith.ma".
(* LISTS OF PAIRS ***********************************************************)
interpretation "nil (list of pairs)" 'Nil = (nil2 ? ?).
-interpretation "cons (list of pairs)" 'Cons hd1 hd2 tl = (cons2 ? ? hd1 hd2 tl).
+interpretation "cons (list of pairs)"
+ 'OPlusRight A1 A2 hd1 hd2 tl = (cons2 A1 A2 hd1 hd2 tl).
-rec definition append2 (A1,A2:Type[0]) (l1,l2:list2 A1 A2) on l1 ≝ match l1 with
-[ nil2 ⇒ l2
-| cons2 a1 a2 tl ⇒ {a1, a2} @ append2 A1 A2 tl l2
-].
-
-interpretation "append (list of pairs)"
- 'Append l1 l2 = (append2 ? ? l1 l2).
-
-rec definition length2 (A1,A2:Type[0]) (l:list2 A1 A2) on l ≝ match l with
+rec definition length2 A1 A2 (l:list2 A1 A2) on l ≝ match l with
[ nil2 ⇒ 0
| cons2 _ _ l ⇒ ↑(length2 A1 A2 l)
].