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What's the cell structure of K(Z/nZ, 1)? Does it let me sum this divergent series? What ab...

The Eilenberg-Maclane space $K(\mathbb{Z}/2\mathbb{Z}, 1)$ has a particularly simple cell structure: it has exactly one cell of each dimension. This means that its "Euler characteristic" should be eq …
Qiaochu Yuan's user avatar