The Čech cohomology invariance conjecture for the o-minimal spectrum

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Let M≼NM\preccurlyeq N, let X=Spec⁡(A)X=\operatorname{Spec}(A) be the o-minimal spectrum under consideration, let Z⊆XZ\subseteq X be definably closed, and let W:=θ−1(Z)W:=\theta^{-1}(Z), where θ\theta is the map from the spectrum over NN to XX defined in Lemma~. Čech cohomology invariance conjecture. Then θ\theta induces an isomorphism between the Čech cohomology of ZZ and that of WW. The conjecture is known when MM expands a field, and the same conclusion holds when NN is an o-minimal expansion of MM rather than merely an elementary extension; the general case remains open.

References

Primary source

Antongiulio Fornasiero, “O-minimal spectrum”, arXiv:math/0612366 (2006).

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