⊦ n < m → dist(m, n) = m - n
m0 < n0, m * n1 = n0 - m0, m0 < n0 ⊦ m * n2 + m0 = 0, m = 0, n2 = 0, n0 = 0, m | dist(m * n2 + m0, n0)
Used terms: m0, n0