作者PttFund (批踢踢基金)
看板Math
标题[分析] 高微(3)
时间Mon Jul 11 22:22:22 2005
Let A and B be connected sets in a metric space and A-B is
separated. Also, suppose
A-B = S∪T,
where cl(S)∩T = S∩cl(T) = ψ. Show that B∪S or B∪T is
connected.
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