English
There exists a neighborhood of radii r > 0 such that HasFiniteFPowerSeriesOnBall f p x n r holds for all r in that neighborhood.
Русский
Существует окрестность радиусов r > 0, внутри которой справедливо HasFiniteFPowerSeriesOnBall f p x n r для всех таких r.
LaTeX
$$$\forall hf : HasFiniteFPowerSeriesAt f p x n,\ ∀ᶠ r \in 𝓝[>0], HasFiniteFPowerSeriesOnBall f p x n r.$$$
Lean4
protected theorem eventually (hf : HasFiniteFPowerSeriesAt f p x n) :
∀ᶠ r : ℝ≥0∞ in 𝓝[>] 0, HasFiniteFPowerSeriesOnBall f p x n r :=
hf.hasFPowerSeriesAt.eventually.mono fun _ h ↦ ⟨h, hf.finite⟩