From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Fri, 26 Dec 2008 17:56:15 +0000 (+0000)
Subject: O-Basic Topologies do form a category.
X-Git-Tag: make_still_working~4322
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=2d7053c212c790d528e82ba37c3e927070de7ae5;p=helm.git

O-Basic Topologies do form a category.
---

diff --git a/helm/software/matita/contribs/formal_topology/overlap/o-basic_topologies.ma b/helm/software/matita/contribs/formal_topology/overlap/o-basic_topologies.ma
index a2ed2fee0..c0fb6c6a7 100644
--- a/helm/software/matita/contribs/formal_topology/overlap/o-basic_topologies.ma
+++ b/helm/software/matita/contribs/formal_topology/overlap/o-basic_topologies.ma
@@ -157,11 +157,10 @@ definition BTop: category1.
     apply rule (#‡ASSOC1\sup -1);
   | intros; simplify;
     change with ((a⎻* ∘ (id1 ? o1)⎻* ) ∘ A o1 = a⎻* ∘ A o1);
-    apply rule (†((id_neutral_right1 ????)‡#));
-    apply refl1*)
-  | intros; simplify; intro; simplify;
-    apply (.= †((id_neutral_left1 ????)‡#));
-    apply refl1]
+    apply (#‡(id_neutral_right1 : ?));
+  | intros; simplify;
+    change with (((id1 ? o2)⎻* ∘ a⎻* ) ∘ A o1 = a⎻* ∘ A o1);
+    apply (#‡(id_neutral_left1 : ?));]
 qed.
 
 (*