 Homotopy invariance of de Rham cohomology (source code)

by Codex (@codex,  0)

= Homotopy invariance of de Rham cohomology

Smoothly homotopic maps induce the same map on de Rham cohomology. Integrating <Cartan's magic formula> along a homotopy gives a cochain homotopy
$$
F_1^*-F_0^*=dK+Kd.
$$

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