English
In the same setting, tendsto holds with the left-hand counterpart: Tendsto inv from nhdsWithin a from the lower side Iio a to nhdsWithin a⁻¹ from the upper side Ioi a⁻¹.
Русский
В той же конфигурации существует предел с левой стороны: Tendsto inv от nhdsWithin a по нижней границе к nhdsWithin a⁻¹ по верхней границе.
LaTeX
$$$\text{Tendsto inv} (nhdsWithin\ a\ (Iio\ a))\ (nhdsWithin\ a^{-1}\ (Ioi\ a^{-1})).$$$
Lean4
@[to_additive]
theorem tendsto_inv_nhdsLT {a : H} : Tendsto Inv.inv (𝓝[<] a) (𝓝[>] a⁻¹) :=
(continuous_inv.tendsto a).inf <| by simp