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Definition 5

[2DD]A set \(A\) equipotent to \(β„•\) is called countably infinite; 1 such a set is infinite (by the result [2GH] above).

  1. Attention, in English the term countable is used for finite or countable sets. By comparison, in Italian the term insieme numerabile is used to denote a countably infinite set.
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  • cardinality
  • countable
  • countably infinite
  • infinite, countably ---
  • numerabile
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