| r1 ∈ H, r ∈ H ⊦ (H ++ r0)[r] = (H[r1, o1] ++ r0)[r], r = r1, r0 = null, r0 ∈ H |
r ∈ H, r0 ≠ null, ¬ r0 ∈ H ⊦ r ≠ r0 → (H ++ r0)[r] = H[r]
r ∈ H, r1 ∈ H, r ∈ H[r1, o1] ⊦ (H ++ r0)[r] = H[r1, o1][r], r = r1, r = r0, r0 = null, r0 ∈ H, r0 ∈ H[r1, o1]
Used simplifier rules: in-write: ⊦ r ∈ H[r0, o] ↔ r ∈ H; Used terms: r, r0, H[r1, o1]