English

Gorenstein homological modules over tensor rings

Rings and Algebras 2025-12-12 v2 K-Theory and Homology

Abstract

For a tensor ring TR(M)T_R(M), under certain conditions, we characterize the Gorenstein projective modules over TR(M)T_R(M), and prove that a TR(M)T_R(M)-module (X,u)(X,u) is Gorenstein projective if and only if uu is monomorphic and coker(u){\rm coker}(u) is a Gorenstein projective RR-module. Gorenstein injective (resp., flat) modules over TR(M)T_R(M) are also explicitly described. Moreover, we give a characterization for the coherence of TR(M)T_R(M). Some applications to trivial ring extensions and Morita context rings are given.

Keywords

Cite

@article{arxiv.2504.21349,
  title  = {Gorenstein homological modules over tensor rings},
  author = {Zhenxing Di and Li Liang and Zhiqian Song and Guoliang Tang},
  journal= {arXiv preprint arXiv:2504.21349},
  year   = {2025}
}

Comments

Final version, to appear in Kyoto J. Math

R2 v1 2026-06-28T23:16:19.424Z