X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2Fdama%2Fdama_didactic%2Fbottom.ma;h=08c1b976136ef3fcba94ce955d389f7b89a4e893;hb=38fccc2b774e493a94eedef76342b56079c0e694;hp=a759416edef4b0821b32e8374a1451db444b8a76;hpb=9eabe046c1182960de8cfdba96c5414224e3a61e;p=helm.git

diff --git a/helm/software/matita/contribs/dama/dama_didactic/bottom.ma b/helm/software/matita/contribs/dama/dama_didactic/bottom.ma
index a759416ed..08c1b9761 100644
--- a/helm/software/matita/contribs/dama/dama_didactic/bottom.ma
+++ b/helm/software/matita/contribs/dama/dama_didactic/bottom.ma
@@ -30,7 +30,7 @@ notation "hvbox(a break ≡ b)"
   non associative with precedence 45
 for @{ 'equiv $a $b }.
 
-interpretation "uguaglianza parziale" 'equiv x y = (eq _ x y).
+interpretation "uguaglianza parziale" 'equiv x y = (eq ? x y).
 
 coercion cic:/matita/tests/decl/L.ind#xpointer(1/1/2).