X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Flib%2Flist_eq.ma;h=be528fc9add20ef0e5cd83766c7efef101df1e21;hb=0bcf2dc1a27e38cb6cd3d44eb838d652926841e0;hp=ffa06ab6d9960c2a0e5758d666be328e0c5efd06;hpb=6604a232815858a6c75dd25ac45abd68438077ff;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/lib/list_eq.ma b/matita/matita/contribs/lambdadelta/ground/lib/list_eq.ma
index ffa06ab6d..be528fc9a 100644
--- a/matita/matita/contribs/lambdadelta/ground/lib/list_eq.ma
+++ b/matita/matita/contribs/lambdadelta/ground/lib/list_eq.ma
@@ -15,7 +15,7 @@
 include "ground/notation/relations/ringeq_3.ma".
 include "ground/lib/list.ma".
 
-(* EXTENSIONAL EQUIVALENCE OF LISTS *****************************************)
+(* EXTENSIONAL EQUIVALENCE FOR LISTS ****************************************)
 
 rec definition list_eq A (l1,l2:list A) on l1 ≝
 match l1 with
@@ -37,18 +37,21 @@ interpretation
 
 (* Basic constructions ******************************************************)
 
-lemma list_eq_refl (A): reflexive … (list_eq A).
+lemma list_eq_refl (A):
+      reflexive … (list_eq A).
 #A #l elim l -l /2 width=1 by conj/
 qed.
 
 (* Main constructions *******************************************************)
 
-theorem eq_list_eq (A,l1,l2): l1 = l2 → l1 ≗{A} l2.
+theorem eq_list_eq (A) (l1) (l2):
+        l1 = l2 → l1 ≗{A} l2.
 // qed.
 
 (* Main inversions **********************************************************)
 
-theorem list_eq_inv_eq (A,l1,l2): l1 ≗{A} l2 → l1 = l2.
+theorem list_eq_inv_eq (A) (l1) (l2):
+        l1 ≗{A} l2 → l1 = l2.
 #A #l1 elim l1 -l1 [| #a1 #l1 #IH ] *
 [ //
 | #a2 #l2 #H elim H