simp [ext_eq_zero_of_lt le, le, not_lt.mpr le]
case inl
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* 𝐈𝚫₀ + 𝛀₁
z S L i : M
le : ‖S‖ ≤ i * ‖L‖
⊢ z = S{L}[i] ↔ (‖S‖ ≤ i * ‖L‖ → z = 0) ∧ (i * ‖L‖ < ‖S‖ → ∃ b ≤ S, Exponential (i * ‖L‖) b ∧ z = S / b % L # 1)
no goals