Theorem: LO.FirstOrder.Arith.Model.not_neg (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 : M
⊢ ¬x < 0
Tactic:
simp
State after:
no goals