Published online by Cambridge University Press: 15 March 2024
In the derived category of a commutative noetherian ring, we explicitly construct a silting object associated with each sp-filtration of the Zariski spectrum satisfying the “slice” condition. Our new construction is based on local cohomology and it allows us to study when the silting object is tilting. For a ring admitting a dualizing complex, this occurs precisely when the sp-filtration arises from a codimension function on the spectrum. In the absence of a dualizing complex, the situation is more delicate and the tilting property is closely related to the condition that the ring is a homomorphic image of a Cohen–Macaulay ring. We also provide dual versions of our results in the cosilting case.
Dedicated to Lidia Angeleri Hügel on the occasion of her 60th birthday
M. Hrbek was supported by the GAČR project 20-13778S and RVO: 67985840. T. Nakamura was supported by PRIN-2017 “Categories, Algebras: Ring-Theoretical and Homological Approaches (CARTHA),” Grant-in-Aid for JSPS Fellows JP20J01865, and Grant-in-Aid for Early-Career Scientists JP23K12954. J. Šťovíček was supported by the GAČR project 20-13778S.