English

On certain DG-algebra resolutions

Commutative Algebra 2023-09-28 v1

Abstract

In this paper we give several classes of Non-Gorenstein local rings AA which satisfy the property that ExtAi(M,A)=0\text{Ext}^i_A(M, A) = 0 for i0i \gg 0 then projdimAM\text{projdim}_A M is finite. We also show that if injdimAM=\text{injdim}_A M = \infty then over such rings the bass-numbers of MM (with respect to m\mathfrak{m}) are unbounded. When AA is a hypersurface ring we give an alternate proof of a result due to Takahashi regarding thick subcategories of the stable category of maximal Cohen-Macaulay AA-modules. This result of Takahashi implies some results due to Avramov, Buchweitez, Huneke and Wiegand. The technique used to prove our results is that the minimal resolution of the relevant rings have an appropriate DG-algebra structure (philosophically this technique is due to Nasseh, Ono, and Yoshino).

Keywords

Cite

@article{arxiv.2309.15440,
  title  = {On certain DG-algebra resolutions},
  author = {Tony J. Puthenpurakal},
  journal= {arXiv preprint arXiv:2309.15440},
  year   = {2023}
}
R2 v1 2026-06-28T12:33:26.677Z