Theorem: LO.FirstOrder.Arith.Model.Seq.mem_seqCons (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 x : M
⊢ ⟪lh s, x⟫ ∈ s ⁀' x
Tactic:
simp [seqCons]
State after:
no goals