English

Gorenstein homological invariants and monoidal model categories of Hopf algebras

Rings and Algebras 2026-01-29 v1 K-Theory and Homology Quantum Algebra

Abstract

Let HH be a Hopf algebra over a field kk with a bijective antipode. It is proved that the Gorenstein global dimension of HH coincides with the Gorenstein projective dimension of the trivial left (or right) HH-module kk. Then, HH is finite dimensional if and only if the Gorenstein projective dimension of kk is trivial. Although monoidal Morita-Takeuchi equivalence of Hopf algebras does not preserve the global dimension, we demonstrate that it does preserve the Gorenstein global dimension and the Artin-Schelter Gorenstein property; this supports Brown-Goodearl's question of whether every noetherian (affine) Hopf algebra is AS Gorenstein. Finally, for HH and an HH-Galois object BB, we show the categories of modules HM_H\mathcal{M} and BMBH_B\mathcal{M}_B^H are monoidal model categories regarding Gorenstein projective model structure, provided that the Gorenstein global dimension of HH is finite. The corresponding stable categories are tensor triangulated categories.

Keywords

Cite

@article{arxiv.2601.20249,
  title  = {Gorenstein homological invariants and monoidal model categories of Hopf algebras},
  author = {Wei Ren and Ruipeng Zhu},
  journal= {arXiv preprint arXiv:2601.20249},
  year   = {2026}
}

Comments

22 pages, comments welcome