[分析] 測度

[hips (hips)]

Let (X,P) be a prob space.

Let {F_a} denote an uncountable collection of disjoint closed sets.

Is it true that there are only countably many F_a that

has positive measure?

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推 LimSinE     :是，|{a|P(F_a)>1/n}|有限，其可數聯集至多可數
→ hips        :感謝樓上.