| # avol = # avol0, n0 < n, n1 < m0, n + m + m0 ≤ # avol0, ∀ m. m < # avol ∧ m ≠ n0 → avol[m] = avol0[m] ⊦ avol[(n + m) + n1] = avol0[(n + m) + n1] |
# avol = # avol0, n1 < m0, n0 < n, n + m + m0 ≤ # avol0, ∀ m. m < # avol0 ∧ m ≠ n0 → avol[m] = avol0[m] ⊦ avol[(n + m) + n1] = avol0[(n + m) + n1]