(* GROUND NOTATION **********************************************************)
notation "hvbox ( 〈 term 46 x1, break term 46 x2 , break term 46 x3, break term 46 x4 〉 )"
- non associative with precedence 55
+ non associative with precedence 75
for @{ 'Tuple $x1 $x2 $x3 $x4 }.