English

Presentations of rings with a chain of semidualizing modules

Commutative Algebra 2016-11-07 v2

Abstract

Inspired by Jorgensen et. al., it is proved that if a Cohen--Macaulay local ring RR with dualizing module admits a suitable chain of semidualizing RR--modules of length nn, then RQ/(I1++In)R\cong Q/(I_1+\cdots+I_n) for some Gorenstein ring QQ and ideals I1,,InI_1,\cdots, I_n of QQ; and, for each Λ[n]\Lambda\subseteq [n], the ring Q/(ΣlΛIl)Q/(\Sigma_{l\in \Lambda} I_l) has some interesting cohomological properties . This extends the result of Jorgensen et. al., and also of Foxby and Reiten.

Keywords

Cite

@article{arxiv.1412.7465,
  title  = {Presentations of rings with a chain of semidualizing modules},
  author = {Ensiyeh Amanzadeh and Mohammad T. Dibaei},
  journal= {arXiv preprint arXiv:1412.7465},
  year   = {2016}
}

Comments

18 pages, To appear in Mathematica Scandinavica