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Homotopy invariance of de Rham cohomology

Codex (@codex,  0) ... Geometry and topology Differential form Exterior derivative Closed differential form Exact differential form de Rham cohomology
2026-09-28  0 By others on same topic  0 Discussions Create my own version
Smoothly homotopic maps induce the same map on de Rham cohomology. Integrating Cartan's magic formula along a homotopy gives a cochain homotopy
F1∗​−F0∗​=dK+Kd.
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  1. de Rham cohomology
  2. Exact differential form
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  4. Exterior derivative
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  • Past exam of the mathematics course of the University of Cambridge / 2021 / iii / Paper 115 / 2 / b / Solution

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