| 0 ≤ j ⊦ # int2bits(j) = n ↔ 2 ^ (n→i(n) - 2) ≤ j ∧ j < 2 ^ (n→i(n) - 1), n = 1, n = 0 |
# int2bits(j) = n, 0 ≤ j ⊦ 2 ^ (n→i(n) - 2) ≤ j ∧ j < 2 ^ (n→i(n) - 1), n = 1, n = 0
2 ^ (n→i(n) - 2) ≤ j ∧ j < 2 ^ (n→i(n) - 1), 0 ≤ j ⊦ # int2bits(j) = n, n = 1, n = 0