I am trying to understand why the following expression is a homotopy invariant.(adsbygoogle = window.adsbygoogle || []).push({});

Start with 2 closed 1 forms whose wedge product is null homologous.

w1^w2 + dw12 = 0

I want to understand why

[tex] \int w_ {1}w_ {2} + \int w_ {12} [/tex]

is a homotopy invariant of smooth paths where

[tex] \int w_{1}w_{2} [/tex]

is the iterated integral of the two 1 forms along the path

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# Problem with iterated integrals

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