[分析] 高微(3)

[PttFund (批踢踢基金)]

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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