X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fformal_topology%2Foverlap%2Fo-basic_pairs.ma;h=3f3389337976967091957ee2e3894b84dc7a14c4;hb=fc8408a10c29e472ec05e725a36da1f71d850937;hp=58725373cd7e353d9f491eec3db87d6715e4e336;hpb=3e094922bf3fec6975fdbe6feceb509eaafe0563;p=helm.git

diff --git a/helm/software/matita/contribs/formal_topology/overlap/o-basic_pairs.ma b/helm/software/matita/contribs/formal_topology/overlap/o-basic_pairs.ma
index 58725373c..3f3389337 100644
--- a/helm/software/matita/contribs/formal_topology/overlap/o-basic_pairs.ma
+++ b/helm/software/matita/contribs/formal_topology/overlap/o-basic_pairs.ma
@@ -90,11 +90,11 @@ definition Oid_relation_pair: ∀o:Obasic_pair. Orelation_pair o o.
     apply (H1 \sup -1);]
 qed.
 
-definition Orelation_pair_composition:
- ∀o1,o2,o3. binary_morphism2 (Orelation_pair_setoid o1 o2) (Orelation_pair_setoid o2 o3) (Orelation_pair_setoid o1 o3).
- intros;
- constructor 1;
-  [ intros (r r1);
+lemma Orelation_pair_composition:
+ ∀o1,o2,o3:Obasic_pair.
+ Orelation_pair_setoid o1 o2 → Orelation_pair_setoid o2 o3→Orelation_pair_setoid o1 o3.
+intros 3 (o1 o2 o3);
+   intros (r r1);
     constructor 1;
      [ apply (r1 \sub\c ∘ r \sub\c) 
      | apply (r1 \sub\f ∘ r \sub\f)
@@ -105,7 +105,16 @@ definition Orelation_pair_composition:
        apply rule (.= ASSOC ^ -1);
        apply (.= H‡#);
        apply rule ASSOC]
-  | intros;
+qed.
+
+
+lemma Orelation_pair_composition_is_morphism:
+  ∀o1,o2,o3:Obasic_pair.
+  Πa,a':Orelation_pair_setoid o1 o2.Πb,b':Orelation_pair_setoid o2 o3.
+   a=a' →b=b' →
+      Orelation_pair_composition o1 o2 o3 a b
+      = Orelation_pair_composition o1 o2 o3 a' b'.
+intros;
     change with (⊩ ∘ (b\sub\c ∘ a\sub\c) = ⊩ ∘ (b'\sub\c ∘ a'\sub\c));  
     change in e with (⊩ ∘ a \sub\c = ⊩ ∘ a' \sub\c);
     change in e1 with (⊩ ∘ b \sub\c = ⊩ ∘ b' \sub\c);
@@ -116,25 +125,60 @@ definition Orelation_pair_composition:
     apply (.= e‡#);
     apply rule (.= ASSOC);
     apply (.= #‡(Ocommute ?? b')\sup -1);
-    apply rule (ASSOC \sup -1)]
+    apply rule (ASSOC \sup -1);
 qed.
-    
-definition OBP: category2.
- constructor 1;
-  [ apply Obasic_pair
-  | apply Orelation_pair_setoid
-  | apply Oid_relation_pair
-  | apply Orelation_pair_composition
-  | intros;
+
+definition Orelation_pair_composition_morphism:
+ ∀o1,o2,o3. binary_morphism2 (Orelation_pair_setoid o1 o2) (Orelation_pair_setoid o2 o3) (Orelation_pair_setoid o1 o3).
+intros; constructor 1;
+[ apply Orelation_pair_composition;
+| apply Orelation_pair_composition_is_morphism;]
+qed.
+
+lemma Orelation_pair_composition_morphism_assoc:
+∀o1,o2,o3,o4:Obasic_pair
+   .Πa12:Orelation_pair_setoid o1 o2
+    .Πa23:Orelation_pair_setoid o2 o3
+     .Πa34:Orelation_pair_setoid o3 o4
+      .Orelation_pair_composition_morphism o1 o3 o4
+       (Orelation_pair_composition_morphism o1 o2 o3 a12 a23) a34
+       =Orelation_pair_composition_morphism o1 o2 o4 a12
+        (Orelation_pair_composition_morphism o2 o3 o4 a23 a34).  
+   intros;
     change with (⊩ ∘ (a34\sub\c ∘ (a23\sub\c ∘ a12\sub\c)) =
                  ⊩ ∘ ((a34\sub\c ∘ a23\sub\c) ∘ a12\sub\c));
     apply rule (ASSOC‡#);
-  | intros;
+qed.
+
+lemma Orelation_pair_composition_morphism_respects_id:
+Πo1:Obasic_pair
+.Πo2:Obasic_pair
+ .Πa:Orelation_pair_setoid o1 o2
+  .Orelation_pair_composition_morphism o1 o1 o2 (Oid_relation_pair o1) a=a.
+   intros;
     change with (⊩ ∘ (a\sub\c ∘ (Oid_relation_pair o1)\sub\c) = ⊩ ∘ a\sub\c);
     apply ((id_neutral_right2 ????)‡#);
-  | intros;
+qed.
+
+lemma Orelation_pair_composition_morphism_respects_id_r:
+Πo1:Obasic_pair
+.Πo2:Obasic_pair
+ .Πa:Orelation_pair_setoid o1 o2
+  .Orelation_pair_composition_morphism o1 o2 o2 a (Oid_relation_pair o2)=a.
+intros;
     change with (⊩ ∘ ((Oid_relation_pair o2)\sub\c ∘ a\sub\c) = ⊩ ∘ a\sub\c);
-    apply ((id_neutral_left2 ????)‡#);]
+    apply ((id_neutral_left2 ????)‡#);
+qed.
+
+definition OBP: category2.
+ constructor 1;
+  [ apply Obasic_pair
+  | apply Orelation_pair_setoid
+  | apply Oid_relation_pair
+  | apply Orelation_pair_composition_morphism
+  | apply Orelation_pair_composition_morphism_assoc;
+  | apply Orelation_pair_composition_morphism_respects_id;
+  | apply Orelation_pair_composition_morphism_respects_id_r;]
 qed.
 
 definition Obasic_pair_of_objs2_OBP: objs2 OBP → Obasic_pair ≝ λx.x.