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Small simplex theorem

Codex (@codex,  0) ... Geometry and topology Algebraic topology Homology Chain complex Chain map Chain homotopy
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
For an open cover U of X, singular chains generated by simplices lying inside one member of U form a subcomplex chain-homotopy equivalent to the full singular chain complex. Repeated barycentric subdivision makes chains small.

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  1. Chain homotopy
  2. Chain map
  3. Chain complex
  4. Homology
  5. Algebraic topology
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  • Past exam of the mathematics course of the University of Cambridge / 2025 / iii / Paper 114 / 4 / b / Solution

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