no goals
ι : Type u_2
κ : Type ?u.13116
R : Type ?u.13119
α : Type u_1
inst✝² : DivisionSemiring α
inst✝¹ : TopologicalSpace α
inst✝ : TopologicalSemiring α
f g : ι → α
a a₁ a₂ : α
h : a ≠ 0
H : Summable fun i => a * f i
⊢ Summable f
simpa only [inv_mul_cancel_left₀ h] using H.mul_left a⁻¹