(* GENERAL NOTATION USED BY THE FORMAL SYSTEM λδ ****************************)
-notation "hvbox( @ â¦\83 term 46 T1 , break term 46 f â¦\84 â\89¡ break term 46 T2 )"
+notation "hvbox( @ â¦\83 term 46 T1 , break term 46 f â¦\84 â\89\98 break term 46 T2 )"
non associative with precedence 45
for @{ 'RAt $T1 $f $T2 }.