※ 引述《kemowu (小展)》之銘言：
: Let Λ be an index set and for every λ in Λ, a is a real number.
: λ
: How to define the series
: Σ a
: λinΛ λ
: to be convergent, when Λ is uncountable?
If there exists a countable subset {λ1,λ2,....}≡N of Λ
such that
Σ a_{λn} diverges
n in N
OTHERWISE, CONVERGENT
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