| n < nused, n < # zbrar, nused ≤ # zbrar, n ≠ 0 → zbrar[n - 1].key < key ⊦ zbrar[n].key < key, (key0 ∈ key-range(zbrar, n, nused, ri[key, adr]) ↔ key0 = key ∨ key0 ∈ key-range(zbrar, n, nused, ri)) ∧ (key0 ∈ key-range(zbrar, n, nused, ri[key, adr]) → ri[key, adr][key0] = key-range(zbrar, n, nused, ri)[key, adr][key0]), n ≠ 0 ∧ n + 1 < nused ∧ nused ≤ # zbrar |
n < # zbrar, n < nused, nused ≤ # zbrar, n ≠ 0 → zbrar[n - 1].key < key ⊦ zbrar[n].key < key, (key0 ∈ key-range(zbrar, n, nused, ri[key, adr]) ↔ key0 = key ∨ key0 ∈ key-range(zbrar, n, nused, ri)) ∧ (key0 ∈ key-range(zbrar, n, nused, ri[key, adr]) → ri[key, adr][key0] = key-range(zbrar, n, nused, ri)[key, adr][key0]), n ≠ 0 ∧ n + 1 < nused