| n * n1 < (n2 * n1) % (n * n1) + n1 ⊦ (n2 * n1) % (n * n1) = 0, n = 0, n1 = 0 |
n * n1 < (n2 * n1) % (n * n1) + n1, ∃ m0, m1. n2 = m0 * n + m1 ∧ m1 < n ⊦ (n2 * n1) % (n * n1) = 0, n = 0, n1 = 0
n * n1 < (n2 * n1) % (n * n1) + n1 ⊦ (n2 * n1) % (n * n1) = 0, n = 0, n1 = 0, ∃ m0, m1. n2 = m0 * n + m1 ∧ m1 < n
Used formulas: ∃ m0, m1. n2 = m0 * n + m1 ∧ m1 < n