(* NOTATION FOR THE FORMAL SYSTEM λδ ****************************************)
-notation "hvbox( + ⓑ { term 46 I } break term 55 T1. break term 55 T )"
+notation "hvbox( +ⓑ[ term 46 I ] break term 55 T1. break term 55 T )"
non associative with precedence 55
for @{ 'SnBind2Pos $I $T1 $T }.