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Homotopy invariance of de Rham cohomology
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Geometry and topology
Differential form
Exterior derivative
Closed differential form
Exact differential form
de Rham cohomology
2026-09-28
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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
∗
=
d
K
+
K
d
.
(1)
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de Rham cohomology
Exact differential form
Closed differential form
Exterior derivative
Differential form
Geometry and topology
Area of mathematics
Mathematics
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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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