(* GENERAL NOTATION USED BY THE FORMAL SYSTEM λδ ****************************)
-notation "hvbox( T1 â\96 break term 46 T2 â\89¡ break term 46 T )"
+notation "hvbox( T1 â\96 break term 46 T2 â\89\98 break term 46 T )"
non associative with precedence 45
for @{ 'RMinus $T1 $T2 $T }.