English
For every x ∈ EReal, the bottom element is strictly less than its inverse: ⊥ < x^{-1}.
Русский
Для любого x ∈ EReal нижняя граница строго меньше своего обратного: ⊥ < x^{-1}.
LaTeX
$$$ \bot < x^{-1} $$$
Lean4
theorem bot_lt_inv (x : EReal) : ⊥ < x⁻¹ := by
cases x with
| bot => exact inv_bot ▸ bot_lt_zero
| top => exact EReal.inv_top ▸ bot_lt_zero
| coe x => exact (coe_inv x).symm ▸ bot_lt_coe (x⁻¹)