Finiteness conjecture for top integral cohomology of configuration spaces

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Let MM be an orientable even dimensional manifold. Assume

rank⁡(Hd−1(M;Z))=0.\operatorname{rank}(H^{d-1}(M;\mathbb{Z}))=0.

Finiteness conjecture. There exist k0∈Nk_{0}\in\mathbb{N} such that

Htop⁡(Ck(M);Z)H^{\operatorname{top}}(C_{k}(M);\mathbb{Z})

is finite for every k≥k0k\geq k_{0}.

This conjecture concerns the eventual finiteness of the top nonzero integral cohomology groups of configuration spaces when the (d−1)(d-1)st cohomology of the manifold has rank zero. The preceding examples indicate finiteness for configuration spaces of R2\mathbb{R}^{2}, while the general pattern in this setting remains unclear.

References

Primary source

Muhammad Yameen, “Arithmeticity for integral cohomological dimension of configuration spaces of manifolds”, arXiv:2305.06604 (2023).

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