- [ "nat_lt ( ?<? )" "nat_lt_pred" "nat_lt_plus" * ]
- [ "nat_le ( ?≤? )" "nat_le_pred" "nat_le_plus" * ]
+ [ "nat_lt ( ?<? )" "nat_lt_pred" "nat_lt_plus" "nat_lt_minus" "nat_lt_minus_plus" * ]
+ [ "nat_le ( ?≤? )" "nat_le_pred" "nat_le_plus" "nat_le_minus" "nat_le_minus_plus" * ]
+ [ "nat_max ( ?∨? )" * ]
+ [ "nat_minus ( ?-? )" "nat_minus_plus" * ]