English

Algebraic properties of tensor product of modules over a field

Commutative Algebra 2025-04-25 v1

Abstract

Let AA and BB be commutative Noetherian algebras over an arbitrary field k\Bbbk such that AkBA \otimes_\Bbbk B is Noetherian. We consider ideals II and JJ of AA and BB, respectively, as well as nonzero finitely generated modules LL and NN over AA and BB, respectively. In this paper, we investigate certain algebraic properties of the AkBA \otimes_\Bbbk B-module LkNL\otimes_{\Bbbk} N, which are often inherited from the properties of the AA-module LL and the BB-module NN. Specifically, we provide characterizations for the Cohen-Macaulayness, generalized Cohen-Macaulayness, and sequentially Cohen-Macaulayness of LkNL\otimes_{\Bbbk} N with respect to the ideal IkB+AkJI \otimes_\Bbbk B + A \otimes_\Bbbk J, in terms of the corresponding properties for LL and NN with respect to II and JJ, respectively.

Keywords

Cite

@article{arxiv.2504.17217,
  title  = {Algebraic properties of tensor product of modules over a field},
  author = {Ahad Rahimi},
  journal= {arXiv preprint arXiv:2504.17217},
  year   = {2025}
}

Comments

19 pages, 1 figure, to appear in Journal of Commutative Algebra