I have a problem with the underlined step of the demonstration (picture below) . Why can $f$ and $g$ be switched ? I can't seem to grasp this part, since I know tensor product is not, in general, commutative. It has to do with the permutation somehow. Someone care to explain?
2026-03-27 06:51:23.1774594283
Anticommutativity wedge product
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