(* 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 @{ 'SnBind2Neg $I $T1 $T }.