| ⊦ align↓(n0, n) = n0 ↔ is-aligned(n0, n), n = 0 |
0 ≠ m ⊦ align↓(n, m) = (n % m = 0 ⊃ n;n / m * m)
⊦ is-aligned(n, m) ↔ n % m = 0
n0 / n * n = n0 ⊦ n0 % n = 0, n = 0
Used simplifier rules: aligndown-def: 0 ≠ m ⊦ align↓(n, m) = (n % m = 0 ⊃ n;n / m * m);%is-aligned-def: ⊦ is-aligned(n, m) ↔ n % m = 0;