English

Gorensteinness, homological invariants and Gorenstein derived categories

Representation Theory 2014-02-14 v2

Abstract

Relations between Gorenstein derived categories, Gorenstein defect categories and Gorenstein stable categories are established. Using these, the Gorensteinness of an algebra AA and invariants with respect to recollements of the bounded Gorenstein derived category Dgpb(A\mboxmod)D^{b}_{gp}(A\mbox{-}{\rm mod}) of AA are investigated. Specifically, the Gorensteinness of AA is characterized in three ways: the existence of Auslander-Reiten triangles in Dgpb(A\mboxmod)D^{b}_{gp}(A\mbox{-}{\rm mod}); recollements of Dgpb(A\mboxmod)D^{b}_{gp}(A\mbox{-}{\rm mod}); and also Gorenstein derived equivalences. It is shown that the finiteness of Cohen-Macaulay type and of finitistic dimension are invariant with respect to the recollements of Dgpb(A\mboxmod)D^{b}_{gp}(A\mbox{-}{\rm mod}).

Keywords

Cite

@article{arxiv.1401.4202,
  title  = {Gorensteinness, homological invariants and Gorenstein derived categories},
  author = {Nan Gao},
  journal= {arXiv preprint arXiv:1401.4202},
  year   = {2014}
}

Comments

arXiv admin note: text overlap with arXiv:1104.4006 by other authors