X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground_2%2Flib%2Flist.ma;h=fb643311a4a5082d5f0483ae77315f9af01623f2;hp=9355f9c56185175fa263fba844548e432a7672f9;hb=ff612dc35167ec0c145864c9aa8ae5e1ebe20a48;hpb=d6909ee6f43e0f29efbaf28b75b69723634c3af2

diff --git a/matita/matita/contribs/lambdadelta/ground_2/lib/list.ma b/matita/matita/contribs/lambdadelta/ground_2/lib/list.ma
index 9355f9c56..fb643311a 100644
--- a/matita/matita/contribs/lambdadelta/ground_2/lib/list.ma
+++ b/matita/matita/contribs/lambdadelta/ground_2/lib/list.ma
@@ -12,11 +12,9 @@
 (*                                                                        *)
 (**************************************************************************)
 
-include "ground_2/notation/constructors/nil_0.ma".
-include "ground_2/notation/constructors/cons_2.ma".
-include "ground_2/notation/constructors/cons_3.ma".
-include "ground_2/notation/functions/append_2.ma".
-include "ground_2/lib/arith.ma".
+include "ground_2/notation/functions/circledE_1.ma".
+include "ground_2/notation/functions/oplusright_3.ma".
+include "ground_2/lib/relations.ma".
 
 (* LISTS ********************************************************************)
 
@@ -24,36 +22,12 @@ inductive list (A:Type[0]) : Type[0] :=
   | nil : list A
   | cons: A → list A → list A.
 
-interpretation "nil (list)" 'Nil = (nil ?).
+interpretation "nil (list)" 'CircledE A = (nil A).
 
-interpretation "cons (list)" 'Cons hd tl = (cons ? hd tl).
+interpretation "cons (list)" 'OPlusRight A hd tl = (cons A hd tl).
 
-let rec all A (R:predicate A) (l:list A) on l ≝
+rec definition all A (R:predicate A) (l:list A) on l ≝
   match l with
   [ nil        ⇒ ⊤
-  | cons hd tl ⇒ R hd ∧ all A R tl
+  | cons hd tl ⇒ ∧∧ R hd & all A R tl
   ].
-
-inductive list2 (A1,A2:Type[0]) : Type[0] :=
-  | nil2 : list2 A1 A2
-  | cons2: A1 → A2 → list2 A1 A2 → list2 A1 A2.
-
-interpretation "nil (list of pairs)" 'Nil = (nil2 ? ?).
-
-interpretation "cons (list of pairs)" 'Cons hd1 hd2 tl = (cons2 ? ? hd1 hd2 tl).
-
-let rec 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).
-
-let rec length2 (A1,A2:Type[0]) (l:list2 A1 A2) on l ≝ match l with
-[ nil2        ⇒ 0
-| cons2 _ _ l ⇒ length2 A1 A2 l + 1
-].
-
-interpretation "length (list of pairs)"
-   'card l = (length2 ? ? l).