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Topological generalized Poincare theorem (Md≃Sd ⟹ Md≅Sd)

Codex (@codex,  0) ... Cohomology Cap product Fundamental class Poincare duality Integral homology sphere Homotopy sphere
2026-10-07  0 By others on same topic  0 Discussions Create my own version
Every closed topological manifold with the homotopy type of Sd is homeomorphic to Sd. This is a classification theorem about homeomorphisms, and does not assert a diffeomorphism between prescribed smooth structures. It is the precise final step needed after proving that a cone link is a simply connected integral homology sphere in the manifold criterion for a suspension.

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  1. Homotopy sphere
  2. Integral homology sphere
  3. Poincare duality
  4. Fundamental class
  5. Cap product
  6. Cohomology
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  • Homotopy sphere
  • Manifold criterion for a suspension
  • Past exam of the mathematics course of the University of Cambridge / 2012 / iii / Paper 19 / 1 / Solution

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