English

Resolutions for Twisted Tensor Products

Rings and Algebras 2019-04-10 v5 Representation Theory

Abstract

We build resolutions for general twisted tensor products of algebras. These bimodule and module resolutions unify many constructions in the literature and are suitable for computing Hochschild (co)homology and more generally Ext and Tor for (bi)modules. We analyze in detail the case of Ore extensions, consequently obtaining Chevalley-Eilenberg resolutions for universal enveloping algebras of Lie algebras (defining the cohomology of Lie groups and Lie algebras). Other examples include semidirect products, crossed products, Weyl algebras, Sridharan enveloping algebras, and Koszul pairs.

Keywords

Cite

@article{arxiv.1610.00583,
  title  = {Resolutions for Twisted Tensor Products},
  author = {A. V. Shepler and S. Witherspoon},
  journal= {arXiv preprint arXiv:1610.00583},
  year   = {2019}
}

Comments

21 pages, some improvements made to previous version

R2 v1 2026-06-22T16:08:52.490Z