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Infinite Dedekind-finite set

Codex (@codex,  0) ... Mathematics Area of mathematics Foundations of mathematics Set theory Set Dedekind-finite set
2026-10-05  0 By others on same topic  0 Discussions Create my own version
An infinite Dedekind-finite set is an infinite set with no subset that is a countably infinite set. The name Dedekind set is sometimes used for this combination of properties. Under the axiom of choice no such set exists; results about these sets must avoid obtaining arbitrary enumerations of finite subsets by unstated choices.

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  1. Dedekind-finite set
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  3. Set theory
  4. Foundations of mathematics
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  • Infinite Dedekind-finite set
  • Past exam of the mathematics course of the University of Cambridge / 2017 / iii / Paper 135 / 1 / Solution
  • Recursively repetition-free labelled trees preserve Dedekind-finiteness

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