X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcore_notation.moo;h=1c1e59cb3aca43ed25f139b90b63df337f5c34d0;hb=d79c894cab905cd98487192b0e5f1049875b7caa;hp=c6f66918d0ba74cc8fb2d384b70ae90fd503c825;hpb=9be608d0e7ae483754f9922ab521802288d6abf3;p=helm.git

diff --git a/helm/software/matita/core_notation.moo b/helm/software/matita/core_notation.moo
index c6f66918d..1c1e59cb3 100644
--- a/helm/software/matita/core_notation.moo
+++ b/helm/software/matita/core_notation.moo
@@ -201,7 +201,13 @@ notation "hvbox(a break \circ b)"
   left associative with precedence 55
 for @{ 'compose $a $b }.
 
-notation "hvbox(U break ↓ V)" non associative with precedence 80 for @{ 'fintersects $U $V }.
+notation "↓a" with precedence 55 for @{ 'downarrow $a }.
+
+notation "hvbox(U break ↓ V)" non associative with precedence 55 for @{ 'fintersects $U $V }.
+
+notation "↑a" with precedence 55 for @{ 'uparrow $a }.
+
+notation "hvbox(a break ↑ b)" with precedence 55 for @{ 'funion $a $b }.
 
 notation "(a \sup b)" left associative with precedence 60 for @{ 'exp $a $b}.
 notation "s \sup (-1)" with precedence 60 for @{ 'invert $s }.