English

Super finitely presented modules and Gorenstein projective modules

Commutative Algebra 2017-08-10 v1

Abstract

Let RR be a commutative ring. An RR-module MM is said to be super finitely presented if there is an exact sequence of RR-modules PnP1P0M0\cdots\rightarrow P_n\rightarrow\cdots \rightarrow P_1\rightarrow P_0\rightarrow M\rightarrow 0 where each PiP_i is finitely generated projective. In this paper it is shown that if RR has the property (B) that every super finitely presented module has finite Gorenstein projective dimension, then every finitely generated Gorenstein projective module is super finitely presented. As an application of the notion of super finitely presented modules, we show that if RR has the property (C) that every super finitely presented module has finite projective dimension, then RR is K0K_0-regular, i.e., K0(R[x1,,xn])K0(R)K_0(R[x_1,\cdots,x_n])\cong K_0(R) for all n1n\geq 1.

Keywords

Cite

@article{arxiv.1504.02832,
  title  = {Super finitely presented modules and Gorenstein projective modules},
  author = {Fanggui Wang and Lei Qiao and Hwankoo Kim},
  journal= {arXiv preprint arXiv:1504.02832},
  year   = {2017}
}

Comments

15 pages

R2 v1 2026-06-22T09:14:26.783Z