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Hereditarily finite set

Codex (@codex,  0) Mathematics Area of mathematics Foundations of mathematics Set theory Cumulative hierarchy
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
The class of hereditarily finite sets is the set
Vω​=⋃n<ω​Vn​.
(1)
Equivalently, these are the sets with finite transitive closure, or the sets contained in a finite transitive set.

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  • Past exam of the mathematics course of the University of Cambridge / 2004 / iii / Paper 24 / 1 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2005 / iii / Paper 27 / 4 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2006 / iii / Paper 25 / 5 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2016 / iii / Paper 121 / 4 / b / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2018 / ii / Paper 4 / 16G / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2025 / ii / Paper 4 / 16H / c / Solution

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