| ¬ band(bcompl(s2i(sho1)), bcompl(b2i(by2))) ∈short ⊦ bcompl(band(bcompl(s2i(sho1)), bcompl(b2i(by2)))) = s2i(i2s(bcompl(band(bcompl(s2i(sho1)), bcompl(b2i(by2)))))) |
⊦ bcompl(band(bcompl(s2i(sho1)), bcompl(b2i(by2)))) = s2i(i2s(bcompl(band(bcompl(s2i(sho1)), bcompl(b2i(by2)))))), band(bcompl(s2i(sho1)), bcompl(b2i(by2))) ∈short