X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2FRELATIONAL%2FNLE%2Finv.ma;h=649a5b8a4cd4b6f6044aaf998a4e8942d4919d60;hb=d9824956d9132109ed5f23380a0a1f9c5181d18a;hp=9d46d6cac8db613465d0eaef1006d635c62d36ef;hpb=ee31ecd9be54fb4a3d815f11d77e88c3c49ff363;p=helm.git

diff --git a/helm/software/matita/contribs/RELATIONAL/NLE/inv.ma b/helm/software/matita/contribs/RELATIONAL/NLE/inv.ma
index 9d46d6cac..649a5b8a4 100644
--- a/helm/software/matita/contribs/RELATIONAL/NLE/inv.ma
+++ b/helm/software/matita/contribs/RELATIONAL/NLE/inv.ma
@@ -12,29 +12,29 @@
 (*                                                                        *)
 (**************************************************************************)
 
-set "baseuri" "cic:/matita/RELATIONAL/NLE/inv".
+
 
 include "NLE/defs.ma".
 
-theorem nle_inv_succ_1: \forall x,y. x < y \to 
-                        \exists z. y = succ z \land x <= z.
- intros. inversion H; clear H; intros; subst. autobatch.
+theorem nle_inv_succ_1: ∀x,y. x < y → 
+                        ∃z. y = succ z ∧ x ≤ z.
+ intros; inversion H; clear H; intros; destruct. autobatch.
 qed.
 
-theorem nle_inv_succ_succ: \forall x,y. x < succ y \to x <= y.
- intros. inversion H; clear H; intros; subst. autobatch.
+theorem nle_inv_succ_succ: ∀x,y. x < succ y → x ≤ y.
+ intros; inversion H; clear H; intros; destruct. autobatch.
 qed.
 
-theorem nle_inv_succ_zero: \forall x. x < zero \to False.
- intros. inversion H; clear H; intros; subst.
+theorem nle_inv_succ_zero: ∀x. x < zero → False.
+ intros. inversion H; clear H; intros; destruct.
 qed.
 
-theorem nle_inv_zero_2: \forall x. x <= zero \to x = zero.
- intros. inversion H; clear H; intros; subst. autobatch.
+theorem nle_inv_zero_2: ∀x. x ≤ zero → x = zero.
+ intros; inversion H; clear H; intros; destruct. autobatch.
 qed.
 
-theorem nle_inv_succ_2: \forall y,x. x <= succ y \to
-                        x = zero \lor \exists z. x = succ z \land z <= y.
- intros. inversion H; clear H; intros; subst;
+theorem nle_inv_succ_2: ∀y,x. x ≤ succ y →
+                        x = zero ∨ ∃z. x = succ z ∧ z ≤ y.
+ intros; inversion H; clear H; intros; destruct;
  autobatch depth = 4.
 qed.