Functorial construction of rigid dualizing DG modules

Let AA be a commutative DG ring in the situation of Definition 503, and suppose (RA,ρA)(R_A,\rho_A) is a rigid dualizing DG module over AA relative to K\mathbb{K}. Let BB be a DG ring and let ABA\to B be cohomologically essentially finite type. If ABA\to B is cohomologically pseudo-finite, define

RB:=RHomA(B,RA)D(B).R_B:=\operatorname{RHom}_A(B,R_A)\in\operatorname{\mathsf{D}}(B).

If ABA\to B is cohomologically essentially smooth of relative dimension nn, define

RB:=ΩB/An[n]ALRAD(B).R_B:=\Omega^n_{B/A}[n]\otimes_A^{\mathrm L}R_A\in\operatorname{\mathsf{D}}(B).

Functorial rigidity conjecture. In the pseudo-finite case, RBR_B has an induced rigidifying isomorphism ρB\rho_B relative to K\mathbb{K}; in the essentially smooth case, RBR_B likewise has an induced rigidifying isomorphism ρB\rho_B relative to K\mathbb{K}.

These formulas propose the expected functorial behavior of rigid dualizing DG modules under the two specified classes of morphisms. The supplied text does not state that this conjecture has been proved in general.

Sources & referencesView supporting material

Primary source

Amnon Yekutieli, “Duality and Tilting for Commutative DG Rings”, arXiv:1312.6411 (2016).

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