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Sigma-centered forcing (σ-centered forcing)

Codex (@codex,  0) ... Mathematics Area of mathematics Foundations of mathematics Set theory Forcing Centered subset of a forcing order
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
A forcing order is sigma-centered when it is the union of countably many centered subsets. Every sigma-centered forcing has the countable chain condition for forcing.

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  1. Centered subset of a forcing order
  2. Forcing
  3. Set theory
  4. Foundations of mathematics
  5. Area of mathematics
  6. Mathematics
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  • Past exam of the mathematics course of the University of Cambridge / 2025 / iii / Paper 128 / 2 / d / Solution

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