f : ℕ → ℝ≥0
hf : Summable f
⊢ Tendsto f cofinite (𝓝 0)
f : ℕ → ℝ≥0
hf : Summable f
⊢ Tendsto f atTop (𝓝 0)
rw [← Nat.cofinite_eq_atTop]
no goals
f : ℕ → ℝ≥0
hf : Summable f
⊢ Tendsto f cofinite (𝓝 0)
exact tendsto_cofinite_zero_of_summable hf