| ~32768 ≤ i ∧ i ≤ 32767, band(i, s2i(i2s(j))) = s2i(i2s(band(i, s2i(i2s(j))))), ~32768 ≤ i, i ≤ 32767, ~32768 ≤ j, j ≤ 32767 ⊦ s2i(i2s(band(i, j))) = band(i, j) |
band(i, s2i(i2s(j))) = s2i(i2s(band(i, s2i(i2s(j))))), j ≤ 32767, ~32768 ≤ j, i ≤ 32767, ~32768 ≤ i ⊦ s2i(i2s(band(i, j))) = band(i, j)