ext x <;> simp[comp_app]
L : Language
L' : Language
L₁ : Language
L₂ : Language
L₃ : Language
ξ : Type u_1
ξ' : Type u_2
ξ₁ : Type u_3
ξ₂ : Type u_4
ξ₃ : Type u_5
n n₁ n₂ n₃ : ℕ
ω : Rew L ξ₁ n₁ ξ₂ n₂
Lf : Language
n' : ℕ
w : Fin n' → SyntacticSemiterm Lf (n + 1)
⊢ Rew.comp free (substs w) = (substs (⇑free ∘ w)).comp shift
no goals