Coordinate independence of the q-de Rham complex

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Let RR be a smooth Z\mathbb Z-algebra, and let □:Z[T1,…,Td]→R\square:\mathbb Z[T_1,\ldots,T_d]\to R be an étale framing. The framed complex q ⁣-⁡ ⁣ΩR[[q−1]]/Z[[q−1]],□∙q\!\operatorname-\!\Omega^\bullet_{R[[q-1]]/\mathbb Z[[q-1]],\square} is a complex of Z[[q−1]]\mathbb Z[[q-1]]-modules. The coordinate-independence conjecture. The framed complex is independent of the choice of coordinates up to canonical quasi-isomorphism; more precisely, there is a functor R↦q ⁣-⁡ ⁣ΩRR\mapsto q\!\operatorname-\!\Omega_R to the ∞\infty-category of E∞E_\infty-Z[[q−1]]\mathbb Z[[q-1]]-algebras, computed by the framed complex for every framing. This would make the construction intrinsic and allow it to glue over smooth schemes.

References

Primary source

Peter Scholze, “Canonical q-deformations in arithmetic geometry”, arXiv:1606.01796 (2016).

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