English

Morita invariance for infinitesimal deformations

Rings and Algebras 2021-04-26 v2

Abstract

Let AA and BB be two Morita equivalent finite dimensional associative algebras over a field k\Bbbk. It is well known that Hochschild cohomology is invariant under Morita equivalence. Since infinitesimal deformations are connected with the second Hochschild cohomology group, we explicitly describe the transfer map connecting HH2(A)\mathsf{HH}^2(A) with HH2(B)\mathsf{HH}^2(B). This allows us to transfer Morita equivalence between AA and BB to that between infinitesimal deformations of them. As an application, when k\Bbbk is algebraically closed, we consider the quotient path algebra associated to AA and describe the presentation by quiver and relations of the infinitesimal deformations of AA.

Keywords

Cite

@article{arxiv.2003.10366,
  title  = {Morita invariance for infinitesimal deformations},
  author = {María Julia Redondo and Lucrecia Román and Fiorela Rossi Bertone and Melina Verdecchia},
  journal= {arXiv preprint arXiv:2003.10366},
  year   = {2021}
}
R2 v1 2026-06-23T14:24:13.436Z