Theorem: LO.FirstOrder.Arith.Model.pow2_mul_four (Arithmetization/ISigmaZero/Exponential/Pow2.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* 𝐈open
a : M
⊢ Pow2 (4 * a) ↔ Pow2 a
Tactic:
simp [←two_mul_two_eq_four, mul_assoc, pow2_mul_two]
State after:
no goals