TODO: Add doc-string.
theorem
NumberField.Odlyzko.tsum_sigma_of_summable
{β : Type u_1}
{E : Type u_2}
[AddCommMonoid E]
[TopologicalSpace E]
[ContinuousAdd E]
[T3Space E]
{γ : β → Type u_3}
(w : (b : β) × γ b → E)
(hfiber : ∀ (b : β), Summable fun (x : γ b) => w ⟨b, x⟩)
(hw : Summable w)
: