X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fformal_topology%2Foverlap%2Fconcrete_spaces.ma;h=791af46b3431b63992ab482889077ca5d0dfeb71;hb=6006ddfa14ae1caa5adf92119fc38a3a7c4919b3;hp=07a067e73f5c62419d11a52eb529f4f9bd0b1af0;hpb=cb98bd7054893edee16aadd6741ec5210b04afbc;p=helm.git

diff --git a/helm/software/matita/contribs/formal_topology/overlap/concrete_spaces.ma b/helm/software/matita/contribs/formal_topology/overlap/concrete_spaces.ma
index 07a067e73..791af46b3 100644
--- a/helm/software/matita/contribs/formal_topology/overlap/concrete_spaces.ma
+++ b/helm/software/matita/contribs/formal_topology/overlap/concrete_spaces.ma
@@ -14,11 +14,12 @@
 
 include "basic_pairs.ma".
 
-(* full_subset e' una coercion che non mette piu' *)
+(* carr1 e' necessario perche' ci sega via la coercion per gli oggetti di REL!
+   (confondendola con la coercion per gli oggetti di SET *)
 record concrete_space : Type1 ≝
  { bp:> BP;
-   converges: ∀a: concr bp.∀U,V: form bp. a ⊩ U → a ⊩ V → a ⊩ (U ↓ V);
-   all_covered: ∀x: concr bp. x ⊩ full_subset (form bp)
+   converges: ∀a: carr1 (concr bp).∀U,V: carr1 (form bp). a ⊩ U → a ⊩ V → a ⊩ (U ↓ V);
+   all_covered: ∀x: carr1 (concr bp). x ⊩ form bp
  }.
 
 record convergent_relation_pair (CS1,CS2: concrete_space) : Type1 ≝