I am struggling to calculate the homology and cohomology of $\mathbb{Z}[1/2]$ wich coefficients in $\mathbb{Z}$ under it's trivial action (by which I mean the additive group of fractions of the form $a/2^i$ for $a\in\mathbb{Z}$ and $i\in\mathbb{N}$). Does anybody know of a projective resolution which I could use to solve this?
2026-03-27 01:00:02.1774573202
Cohomology/Homology of $\mathbb{Z}[1/p]$
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