| int2bytes(i) = i2b(0) ' + bytes ∧ i < 0 ∧ i2b(0) ∈ int2bytes(i), ∀ bytes, i0. i→n(i0) < i→n(i) → int2bytes(i0) = i2b(0) ' + bytes ∧ i0 < 0 ∧ i2b(0) ∈ int2bytes(i0) → false ⊦ false |
int2bytes(i) = i2b(0) ' + bytes, i2b(0) ∈ int2bytes(i), i < 0, ∀ bytes, i0. i→n(i0) < i→n(i) → int2bytes(i0) = i2b(0) ' + bytes ∧ i0 < 0 ∧ i2b(0) ∈ int2bytes(i0) → false ⊦