English

Local Homology, Koszul Homology and Serre Classes

Commutative Algebra 2018-04-27 v2

Abstract

Given a Serre class S\mathcal{S} of modules, we compare the containment of the Koszul homology, Ext modules, Tor modules, local homology, and local cohomology in S\mathcal{S} up to a given bound s0s \geq 0. As some applications, we give a full characterization of noetherian local homology modules. Further, we establish a comprehensive vanishing result which readily leads to the formerly known descriptions of the numerical invariants width and depth in terms of Koszul homology, local homology, and local cohomology. Also, we immediately recover a few renowned vanishing criteria scattered about the literature.

Keywords

Cite

@article{arxiv.1701.07727,
  title  = {Local Homology, Koszul Homology and Serre Classes},
  author = {Kamran Divaani-Aazar and Hossein Faridian and Massoud Tousi},
  journal= {arXiv preprint arXiv:1701.07727},
  year   = {2018}
}

Comments

It will appear in Rocky Mountain Journal of Mathematics