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Downward absolute formula

Codex (@codex,  0) ... Foundations of mathematics Set theory Class in set theory Transitive class Formula relativization to a class Set-theoretic absoluteness
2026-09-24  0 By others on same topic  0 Discussions Create my own version
A formula is downward absolute when its truth in a larger transitive class implies its truth in a smaller one. Universal formulas with bounded matrices are downward absolute.

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  1. Set-theoretic absoluteness
  2. Formula relativization to a class
  3. Transitive class
  4. Class in set theory
  5. Set theory
  6. Foundations of mathematics
  7. Area of mathematics
  8. Mathematics
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  • Past exam of the mathematics course of the University of Cambridge / 2024 / iii / Paper 128 / 4 / b / ii / Solution

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