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Theorems · Theorem · sequences and series

multipliable_one_add_of_summable

∀ {ι : Type u_1} {R : Type u_2} [inst : NormedCommRing R] [NormOneClass R] {f : ι → R} [CompleteSpace R],
  (Summable fun i => ‖f i‖) → Multipliable fun i => 1 + f i

In a complete normed ring, ∏' i, (1 + f i) is convergent if the sum of real numbers ∑' i, ‖f i‖ is convergent.

Defined in
Mathlib.Analysis.SpecialFunctions.Log.Summable
Cited by
4 results in Mathlib
Foundations
Depth 280 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
NormedCommRingNormOneClassCompleteSpace

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