(* NOTATION FOR THE FORMAL SYSTEM λδ ****************************************)
-notation "hvbox( ⦃ term 46 G, break term 46 L ⦄ ⊢ 𝐑 break [ term 46 h , break term 46 g ] break ⦃ term 46 T ⦄ )"
+notation "hvbox( ⦃ term 46 G, break term 46 L ⦄ ⊢ ➡ break [ term 46 h , break term 46 g ] 𝐑 break ⦃ term 46 T ⦄ )"
non associative with precedence 45
for @{ 'Reducible $h $g $G $L $T }.