Theorem: LO.FirstOrder.Arith.Model.add_assoc (Logic/FirstOrder/Arith/PeanoMinus.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* 𝐏𝐀⁻
⊢ ∀ (x y z : M), x + y + z = x + (y + z)
Tactic:
simpa[models_iff] using ModelsTheory.models M Theory.peanoMinus.addAssoc
State after:
no goals