X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fformal_topology%2Foverlap%2Fo-concrete_spaces.ma;h=7292b4ecb336c0a86580a2e5f6559bf8bc5a771f;hb=4ead19b19835213b82e451ee6fd2ed026ed3f4a5;hp=135dae3c981e0ae95c48d4c9544b5a059c65451b;hpb=62e9e8296d172d6497f9ad29bad402fbad2014c3;p=helm.git

diff --git a/helm/software/matita/contribs/formal_topology/overlap/o-concrete_spaces.ma b/helm/software/matita/contribs/formal_topology/overlap/o-concrete_spaces.ma
index 135dae3c9..7292b4ecb 100644
--- a/helm/software/matita/contribs/formal_topology/overlap/o-concrete_spaces.ma
+++ b/helm/software/matita/contribs/formal_topology/overlap/o-concrete_spaces.ma
@@ -20,9 +20,9 @@ coercion xxx.
 
 record concrete_space : Type ≝
  { bp:> BP;
-   downarrow: form bp → oa_P (form bp);
+   downarrow: unary_morphism (oa_P (form bp)) (oa_P (form bp));
    downarrow_is_sat: is_saturation ? downarrow;
-   converges: ∀q1,q2:form bp.
+   converges: ∀q1,q2.
      or_f_minus ?? (⊩) q1 ∧ or_f_minus ?? (⊩) q2 = 
      or_f_minus ?? (⊩) ((downarrow q1) ∧ (downarrow q2));
    all_covered: (*⨍^-_bp*) or_f_minus ?? (⊩) (oa_one (form bp)) = oa_one (concr bp);