First experiment in Padua about formal topologies.

[helm.git] / helm / software / matita / library / demo / realisability.ma

diff --git a/helm/software/matita/library/demo/realisability.ma b/helm/software/matita/library/demo/realisability.ma
index 93b5e712f24724cee2d004ea2f30e65432e1f16b..d1b569c4075ddc7abf362856eb683840b8e35d74 100644 (file)
--- 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}