Niceness was just a temporary illusion :-(

[helm.git] / helm / software / matita / contribs / formal_topology / overlap / o-basic_topologies.ma

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 640a936ee21a194e1cd35a291ebce95dd2870d15..be985a43cefd551e01fd6ea942dcc220dea8b622 100644 (file)
--- a/helm/software/matita/contribs/formal_topology/overlap/o-basic_topologies.ma
+++ b/helm/software/matita/contribs/formal_topology/overlap/o-basic_topologies.ma
@@ -135,11 +135,6 @@ definition continuous_relation_comp:
      | apply refl1]]
 qed.
 
-lemma hintx: ∀S,T. (S ⇒ T) → unary_morphism1 S T.
- intros; apply t;
-qed.
-coercion hintx.
-
 definition BTop: category2.
  constructor 1;
   [ apply basic_topology
@@ -160,13 +155,16 @@ definition BTop: category2.
        change with (b⎻* (a'⎻* (A o1 x)) = b'⎻*(a'⎻* (A o1 x)));
        alias symbol "trans" = "trans1".
        alias symbol "prop1" = "prop11".
-       apply (.= †(saturated o1 o2 a' (A o1 x) : ?));
-        [ apply ((saturation_idempotent ?? (A_is_saturation o1) x)^-1); ]
+       alias symbol "invert" = "setoid1 symmetry".
+       lapply (.= †(saturated o1 o2 a' (A o1 x) : ?));
+        [3: apply (b⎻* ); | 5: apply Hletin; |1,2: skip;
+        |apply ((saturation_idempotent ?? (A_is_saturation o1) x)^-1); ]
        change in e1 with (∀x.b⎻* (A o2 x) = b'⎻* (A o2 x));
        apply (.= (e1 (a'⎻* (A o1 x))));
        alias symbol "invert" = "setoid1 symmetry".
-       apply (†((saturated ?? a' (A o1 x) : ?) ^ -1));
-       apply ((saturation_idempotent ?? (A_is_saturation o1) x)^-1);]
+       lapply (†((saturated ?? a' (A o1 x) : ?) ^ -1));
+        [2: apply (b'⎻* ); |4: apply Hletin; | skip;
+        |apply ((saturation_idempotent ?? (A_is_saturation o1) x)^-1);]]
   | intros; simplify;
     change with (((a34⎻* ∘ a23⎻* ) ∘ a12⎻* ) ∘ A o1 = ((a34⎻* ∘ (a23⎻* ∘ a12⎻* )) ∘ A o1));
     apply rule (#‡ASSOC1\sup -1);