| 0 ≤ i ⊦ band(i - j, i) + band(j, i) = i, false ∈ int2bits(i).rest |
⊦ 0 ≤ j ∧ ¬ false ∈ int2bits(i).rest ∧ 0 ≤ i → band(j, i) = j % (i + 1)
¬(0 ≤ j ∧ ¬ false ∈ int2bits(i).rest ∧ 0 ≤ i), 0 ≤ i ⊦ band(i - j, i) + band(j, i) = i, false ∈ int2bits(i).rest
0 ≤ j ∧ ¬ false ∈ int2bits(i).rest ∧ 0 ≤ i, 0 ≤ i ⊦ band(i - j, i) + j % (i + 1) = i, false ∈ int2bits(i).rest
Used terms: i, j