Section Properties1.
Context {K : AbsRing} {V : NormedModule K}.
(** Extensionality *)
(** Index offset *)
End Properties1.
(** * Convergence theorems *)
(** Comparison *)

Lemma Series_le (a b : nat -> R) :
(forall n : nat, 0 <= a n <= b n) ->
ex_series b -> Series a <= Series b.