(* GROUND NOTATION **********************************************************)
notation "hvbox ( 〈 term 46 x1, break term 46 x2 , break term 46 x3, break term 46 x4 〉 )"
(* GROUND NOTATION **********************************************************)
notation "hvbox ( 〈 term 46 x1, break term 46 x2 , break term 46 x3, break term 46 x4 〉 )"