X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2Fcontribs%2FPREDICATIVE-TOPOLOGY%2Fcoa_props.ma;h=6c004073e7390e4c2fe172cb105316be13911763;hb=1a40d93d10be4ee71ae9474384af931d70918690;hp=47fd8ab6191797127778025c41375ecb923b5d71;hpb=a982d8d4f17ab876ad03658a71fa4b964d8ccd3b;p=helm.git

diff --git a/helm/matita/contribs/PREDICATIVE-TOPOLOGY/coa_props.ma b/helm/matita/contribs/PREDICATIVE-TOPOLOGY/coa_props.ma
index 47fd8ab61..6c004073e 100644
--- a/helm/matita/contribs/PREDICATIVE-TOPOLOGY/coa_props.ma
+++ b/helm/matita/contribs/PREDICATIVE-TOPOLOGY/coa_props.ma
@@ -16,10 +16,13 @@ set "baseuri" "cic:/matita/PREDICATIVE-TOPOLOGY/coa_props".
 
 include "coa_defs.ma".
 
-coercion Type_of_COA. (* this should be generated by the following line *)
-coercion coa. (* this should be inside coa_defs.moo but it isn't *)
+inductive True:Prop \def T:True.
 
-theorem zero_le: \forall (P:COA). \forall (p:P). le ? (zero P) p.
+theorem zero_le: 
+  \forall (P:COA). \forall (p:P). (le ? (zero P) p) \to True.
+  intros.
+  exact T.
+qed.