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[helm.git] / helm / software / matita / contribs / formal_topology / overlap / basic_pairs.ma

diff --git a/helm/software/matita/contribs/formal_topology/overlap/basic_pairs.ma b/helm/software/matita/contribs/formal_topology/overlap/basic_pairs.ma
index 9d4cbbed0d44b3c5ed71afbaaecfba9d1e13002c..0734411f8d07192881bcb29516b089959d80f2d8 100644 (file)
--- a/helm/software/matita/contribs/formal_topology/overlap/basic_pairs.ma
+++ b/helm/software/matita/contribs/formal_topology/overlap/basic_pairs.ma
@@ -15,42 +15,26 @@
 include "relations.ma".
 include "notation.ma".
 
-record basic_pair: Type1 ≝
- { concr: REL;
-   form: REL;
-   rel: arrows1 ? concr form
- }.
+record basic_pair: Type1 ≝ { 
+   concr: REL; form: REL; rel: concr ⇒_\r1 form
+}.
 
 interpretation "basic pair relation" 'Vdash2 x y c = (fun21 ??? (rel c) x y).
 interpretation "basic pair relation (non applied)" 'Vdash c = (rel c).
 
-alias symbol "eq" = "setoid1 eq".
-alias symbol "compose" = "category1 composition".
-record relation_pair (BP1,BP2: basic_pair): Type1 ≝
- { concr_rel: arrows1 ? (concr BP1) (concr BP2);
-   form_rel: arrows1 ? (form BP1) (form BP2);
-   commute: ⊩ ∘ concr_rel = form_rel ∘ ⊩
+record relation_pair (BP1,BP2: basic_pair): Type1 ≝ { 
+   concr_rel: (concr BP1) ⇒_\r1 (concr BP2); form_rel: (form BP1) ⇒_\r1 (form BP2);
+   commute: ⊩ ∘ concr_rel =_1 form_rel ∘ ⊩
  }.
 
-
 interpretation "concrete relation" 'concr_rel r = (concr_rel ?? r). 
 interpretation "formal relation" 'form_rel r = (form_rel ?? r).
 
-definition relation_pair_equality:
- ∀o1,o2. equivalence_relation1 (relation_pair o1 o2).
- intros;
- constructor 1;
-  [ apply (λr,r'. ⊩ ∘ r \sub\c = ⊩ ∘ r' \sub\c);
-  | simplify;
-    intros;
-    apply refl1;
-  | simplify;
-    intros 2;
-    apply sym1;
-  | simplify;
-    intros 3;
-    apply trans1;
-  ]      
+definition relation_pair_equality: ∀o1,o2. equivalence_relation1 (relation_pair o1 o2).
+ intros; constructor 1; [ apply (λr,r'. ⊩ ∘ r \sub\c = ⊩ ∘ r' \sub\c);
+  | simplify; intros; apply refl1;
+  | simplify; intros 2; apply sym1;
+  | simplify; intros 3; apply trans1; ]      
 qed.
 
 definition relation_pair_setoid: basic_pair → basic_pair → setoid1.
@@ -66,7 +50,7 @@ definition relation_pair_of_relation_pair_setoid :
 coercion relation_pair_of_relation_pair_setoid.
 
 lemma eq_to_eq': 
-  ∀o1,o2.∀r,r':relation_pair_setoid o1 o2. r=r' → r \sub\f ∘ ⊩ = r'\sub\f ∘ ⊩.
+  ∀o1,o2.∀r,r':relation_pair_setoid o1 o2. r =_1 r' → r \sub\f ∘ ⊩ = r'\sub\f ∘ ⊩.
  intros 7 (o1 o2 r r' H c1 f2);
  split; intro H1;
   [ lapply (fi ?? (commute ?? r c1 f2) H1) as H2;