exact phi_ih j h1
case h.e'_1
zs : List String
phi : Formula
phi_ih : ∀ (j : ℕ), lc_at j phi → openList j (List.map free_ zs) phi = phi
j : ℕ
h1 : lc_at j phi
⊢ openList j (List.map free_ zs) phi = phi
no goals