X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fdemo%2Frealisability.ma;h=d1b569c4075ddc7abf362856eb683840b8e35d74;hb=7a29aa43eb607d019699f0a76dc83e7093e5b222;hp=93b5e712f24724cee2d004ea2f30e65432e1f16b;hpb=9eabe046c1182960de8cfdba96c5414224e3a61e;p=helm.git

diff --git a/helm/software/matita/library/demo/realisability.ma b/helm/software/matita/library/demo/realisability.ma
index 93b5e712f..d1b569c40 100644
--- a/helm/software/matita/library/demo/realisability.ma
+++ b/helm/software/matita/library/demo/realisability.ma
@@ -57,7 +57,7 @@ definition pi2 ≝
   match s return λs.P (pi1 ? ? s) with
    [ sigma_intro _ p ⇒ p].
 
-notation "hvbox(Σ ident i opt (: ty) break . p)"
+notation "hvbox(\Sigma ident i opt (: ty) break . p)"
   right associative with precedence 20
 for @{ 'sigma ${default
   @{\lambda ${ident i} : $ty. $p}