| s→n(n→s(m % 10)) = m % 10, s→n(n→s(m / 10)) = m / 10, 10 ≤ m, ∀ m1. m1 < m → true → s→n(n→s(m1)) = m1 ⊦ m = 0, m / 10 * 10 + s→n(n→s(m % 10)) = m |
s→n(n→s(m % 10)) = m % 10, s→n(n→s(m / 10)) = m / 10, 10 ≤ m, ∀ m1. m1 < m → true → s→n(n→s(m1)) = m1 ⊦ m = 0, m / 10 * 10 + m % 10 = m