Theorem: LO.FirstOrder.Arith.Model.opos_lt_sq_pos_iff (Arithmetization/Vorspiel/Lemmata.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⁻
a✝ b c a : M
⊢ 0 < a ^ 2 ↔ 0 < a
Tactic:
simp [sq, pos_iff_ne_zero]
State after:
no goals