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E10

[0VP] Topics:compact.Prerequisites:[0V6].

Let (X,d) be a metric space, and let AnX be compact non-empty subsets such that An+1An: then nAn.

(This result can be derived from [0J6]; but try to give a direct demonstration, using the characterization of ”compact” as ”sequentially compact ”, i.e. the first point in [0V3]).

Solution 1

[0VQ]

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  • Cantor, intersection theorem
  • intersection theorem , see Cantor, intersection theorem
  • theorem, intersection --- , see Cantor, intersection theorem
  • compact set
  • metric space
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