| H[r0] = ((∅ ++ r)[r, o] ∪ H0)[r0], P(H0), r0 ∈ H, r0 ∈ (∅ ++ r)[r, o] ∪ H0 ⊦ r = null, P(H), r ∈ H, r ∈ H0, r0 ∈ H0 |
⊦ H0 ⊥ H1 → (r ∈ H0 ∪ H1 ↔ r ∈ H0 ∨ r ∈ H1)
Used simplifier rules: ⊦ H0 ⊥ H1 → (r ∈ H0 ∪ H1 ↔ r ∈ H0 ∨ r ∈ H1); (s)%r ∈ H0 ∪ H1 ⊦ H0 ⊥ H1 → (H0 ∪ H1)[r] = (r ∈ H0 ⊃ H0[r];H1[r]); (s)% ⊦ r ∈ H[r0, o] ↔ r ∈ H; (s)% ⊦ ¬ r ∈ ∅; (s)%r0 ≠ null, ¬ r0 ∈ H ⊦ r ∈ H ++ r0 ↔ r = r0 ∨ r ∈ H; (s)%r ≠ null ⊦ (∅ ++ r)[r, o] ⊥ H ↔ ¬ r ∈ H; (s) Used terms: H0, (∅ ++ r)[r, o], r0