Theorem: LO.FirstOrder.Arith.Model.Seq.restr (Arithmetization/ISigmaOne/HFS/Seq.lean)

State before:
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
H : Seq s
i : M
hi : i ≤ lh s
⊢ under i ⊆ domain s
Tactic:
simp [H.domain_eq, hi]
State after:
no goals