Question
Does Cantor’s intersection theorem hold for the metric space with the standard metric? Justify your answer.
Answer :
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Cantor’s intersection theorem does not hold for the metric space (X=(0,1]) with the standard metric. The reason is that (X) is not complete, and a concrete counterexample can be given. For each (n\in\mathbb{N}), define [ F_n=(0,1/n]\subset X. ] Each (F_n) is
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