(* NOTATION FOR THE FORMAL SYSTEM λδ ****************************************)
-notation "hvbox( G ⊢ break term 46 L1 ⫃ [ break term 46 R ] break term 46 L2 )"
+notation "hvbox( G ⊢ break term 46 L1 ⫃[ break term 46 R ] break term 46 L2 )"
non associative with precedence 45
for @{ 'LRSubEqC $R $G $L1 $L2 }.