| nP0 ⊗_(n + 1, m0) = nP1 ⊗_(n + 1, m0), ∀ n0. ¬ m0 < n0 → nP0(n + n0) = nP1(n + n0) ⊦ nP0(n) * nP0 ⊗_(n + 1, m0) = nP1(n) * nP1 ⊗_(n + 1, m0) |
nP0 ⊗_(n + 1, m0) = nP1 ⊗_(n + 1, m0), ∀ n0. ¬ m0 < n0 → nP0(n + n0) = nP1(n + n0) ⊦ nP0(n) * nP1 ⊗_(n + 1, m0) = nP1(n) * nP1 ⊗_(n + 1, m0)