case all p =>
  rw[Equiv.symm_apply_eq]
  exact fintypeArrowEquivFinArrow_app _ _
L : Language
μ : Type v
inst✝⁴ : (k : ℕ) → Primcodable (L.Func k)
inst✝³ : (k : ℕ) → Primcodable (L.Rel k)
inst✝² : UniformlyPrimcodable L.Func
inst✝¹ : UniformlyPrimcodable L.Rel
inst✝ : Primcodable μ
this : Primrec fun x => (((equivW L μ) x).inversion.1, List.map (⇑(equivW L μ).symm) ((equivW L μ) x).inversion.2)
p : UFormula L μ
⊢ (equivW L μ).symm (fintypeArrowEquivFinArrow (fun x => (equivW L μ) p) 0) = p
no goals