The twisting classification conjecture for three-functor formalisms

Let C\mathcal{C} be an \infty-category, and let

D:Corr(C)Cat\mathcal{D}:\operatorname{Corr}(\mathcal{C})^\otimes\to\operatorname{Cat}_\infty

be a three-functor formalism. Let LZD\mathfrak{LZ}_\mathcal{D}^\otimes be its symmetric monoidal (,2)(\infty,2)-category of cohomological correspondences, with underlying symmetric monoidal \infty-category LZD\operatorname{LZ}_\mathcal{D}^\otimes. Write TCT_\mathcal{C} for the twist object and D\mathcal{D}^* for the associated functor.

Twisting classification conjecture. There is a canonical isomorphism of anima

HomCAlg(Cat)Cop,/(Corr(C),LZD)HomFun(Cop,CAlg(Cat))(TC,D).\operatorname{Hom}_{\operatorname{CAlg}(\operatorname{Cat}_\infty)_{\mathcal{C}^{\operatorname{op},\sqcup}/}}(\operatorname{Corr}(\mathcal{C})^\otimes,\operatorname{LZ}_\mathcal{D}^\otimes)\simeq \operatorname{Hom}_{\operatorname{Fun}(\mathcal{C}^{\operatorname{op}},\operatorname{CAlg}(\operatorname{Cat}_\infty))}(T_\mathcal{C},\mathcal{D}^*).

This conjecture aims to characterize the six-functor formalisms obtained by twisting a given formalism. It is presented as an outlook for cases not covered by Scholze's conjecture, and in particular asks for a construction of the twisted three-functor formalisms.

Sources & referencesView supporting material

Primary source

Adam Dauser and Josefien Kuijper, “Uniqueness of six-functor formalisms”, arXiv:2412.15780 (2025).

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