English

Finitistic dimension and Endomorphism algebras of Gorenstein projective modules

Representation Theory 2018-02-05 v1

Abstract

Let AA be an Artin algebra, MM be a Gorenstein projective AA-module and B=B = EndAM_A M, then MM is a AA-BB-bimodule. We use the restricted flat dimension of MBM_B to give a characterization of the homological dimensions of AA and BB, and obtain the following main results: (1) if AA is a CM-finite algebra with GP\cal GP(AA) = addAE_AE and fin.dim A2,A \geq 2, then fin.dim Bfin.dim A+rfd(MB)+pdBHomA(M,E);{\rm fin.dim}\ B \leq {\rm fin.dim}\ A + {\rm rfd}(M_B) +{\rm pd}_B{\rm Hom}_A(M, E); (2) If AA is a CM-finite nn-Gorenstein algebra with GP\cal GP(AA) = addAE_AE and n2n \geq 2, then gl.dim Bn+pdBHomA(M,E).B \leq n + {\rm pd}_B{\rm Hom}_A(M, E).

Keywords

Cite

@article{arxiv.1802.00669,
  title  = {Finitistic dimension and Endomorphism algebras of Gorenstein projective modules},
  author = {Aiping Zhang},
  journal= {arXiv preprint arXiv:1802.00669},
  year   = {2018}
}