Theorem: LO.FirstOrder.Arith.Model.one_lt_iff_two_le (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 : M
⊢ 1 < a ↔ 2 ≤ a
Tactic:
simp [lt_iff_succ_le, one_add_one_eq_two]
State after:
no goals