⊦ ((P0 -* P1))(H) ↔ (∀ H1. H1 ⊥ H ∧ P0(H1) → P1(H1 ∪ H))
P0(H), ∀ H. ((P0 * P1))(H) → P2(H) ⊦ ∀ H1. H1 ⊥ H ∧ P1(H1) → P2(H1 ∪ H)
Used terms: H, P2, P1