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