The integral-model intersection conjecture for singular support

Let XX be the scheme under consideration, let D(X)\boldsymbol{D}(X) denote the relevant derived category, and let Λ\Lambda be an algebraic extension of Q\mathbb{Q}_\ell. For FD(X)\mathcal F\in D(X), an integral model F0\mathcal F_0 is an integral model of F\mathcal F in the sense used in the paper, and SS(F)SS(\mathcal F) denotes its singular support.

Integral-model intersection conjecture.

SS(F)=SS(F0),SS(\mathcal F)=\bigcap SS(\mathcal F_0),

where the intersection is taken over all integral models F0\mathcal F_0 for F\mathcal F.

The statement addresses the difficulty of constructing nontrivial examples in which an integral model has strictly larger singular support than the original sheaf. Its status is not resolved in the supplied text.

Sources & referencesView supporting material

Primary source

Owen Barrett, “The singular support of an -adic sheaf”, arXiv:2309.02587 (2024).

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