exact ⟨hs, l, (by
calc
  l ≤ domain s := by simp [h]
  _ ≤ 2 * s    := by simp), ⟨domain s , by simp,  rfl, h⟩⟩
case intro.intro
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚺₁
s : M
hs : IsMapping s
l : M
h : domain s = under l
⊢ IsMapping s ∧ ∃ l ≤ 2 * s, ∃ d ≤ 2 * s, d = domain s ∧ d = under l
no goals