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