English

DG singular equivalence and singular locus

Commutative Algebra 2025-04-22 v6 Algebraic Geometry Rings and Algebras Representation Theory

Abstract

For a commutative Gorenstein Noetherian ring RR, we construct an affine scheme XX solely from DG singularity category Sdg(R)S_{dg}(R) of RR such that there is a finite surjective morphism XSpec(R/I)X \rightarrow \mathrm{Spec}(R /I), where Spec(R/I)\mathrm{Spec}(R /I) is the singular locus in Spec(R)\mathrm{Spec}(R). As an application, for two such rings with equivalent DG singularity categories, we prove that the singular loci in their affine schemes have the same dimension.

Keywords

Cite

@article{arxiv.2403.13637,
  title  = {DG singular equivalence and singular locus},
  author = {Leilei Liu and Jieheng Zeng},
  journal= {arXiv preprint arXiv:2403.13637},
  year   = {2025}
}

Comments

18 pages

R2 v1 2026-06-28T15:27:25.583Z