Hi everybody,(adsbygoogle = window.adsbygoogle || []).push({});

Currently, I am studying cohomology on my own. I have a question:

WhyH^{r}_{D}(M) = 0, whenr>n

nis the dimension of manifoldM

My book says it is obvious, but to me it is not obvious.

I wish someone could explain this question to me.

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# A Conceptual Question on de Rham cohomology.

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