exact ⟨toSubformula_ofSubformula p, toSubformula_ofSubformula q⟩
L : Language
μ : Type v
x✝ : ℕ
p q : Semiformula L μ x✝
⊢ (↑(ofSubformula p)).toSubformula ⋯ = p ∧ (↑(ofSubformula q)).toSubformula ⋯ = q
no goals