print an error message if graphviz is not found

[helm.git] / helm / software / matita / core_notation.moo

diff --git a/helm/software/matita/core_notation.moo b/helm/software/matita/core_notation.moo
index cceee24124153d236671b761b466f5af791afaa3..1c1e59cb3aca43ed25f139b90b63df337f5c34d0 100644 (file)
--- a/helm/software/matita/core_notation.moo
+++ b/helm/software/matita/core_notation.moo
@@ -201,6 +201,14 @@ notation "hvbox(a break \circ b)"
   left associative with precedence 55
 for @{ 'compose $a $b }.
 
+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 }.
 notation < "s \sup (-1) x" with precedence 60 for @{ 'invert_appl $s $x}.