Magnitude of modules

S Yassemi - Communications in Algebra, 1995 - Taylor & Francis
Magnitude of modules Page 1 COMMUNICATIONS IN ALGEBRA, 23(1 l), 3993-4008 (1995)
MAGNITUDE OF MODULES SIAMAK YASSEMI Matematisk Institut, Universitetsparken 5 …

Finiteness of Gorenstein injective dimension of modules

L Khatami, M Tousi, S Yassemi - Proceedings of the American …, 2009 - ams.org
The Chouinard formula for the injective dimension of a module over a noetherian ring is
extended to Gorenstein injective dimension. Specifically, if $ M $ is a module of finite …

Depth formulas, restricted Tor-dimension under base change

T Sharif, S Yassemi - The Rocky Mountain Journal of Mathematics, 2004 - JSTOR
Let R be a commutative Noetherian ring, and let M and N be R-modules. It is shown that
\sup\left{i\left|Tor\right._i^R\left(M,N\right)≠0\right\}=\sup\left{depthR_p-depth_R_pM_p …

Depth formula via complete intersection flat dimension

P Sahandi, T Sharif, S Yassemi - Communications in Algebra, 2011 - Taylor & Francis
We prove the depth formula, for homologically bounded complexes X, Y provided that the
complete intersection flat dimension of X is finite and. In particular, let M and N be two R …

Detecting flatness over smooth bases

LL Avramov, SB Iyengar - arXiv preprint arXiv:1002.3652, 2010 - arxiv.org
Given an essentially finite type morphism of schemes f: X--> Y and a positive integer d, let
f^{d}: X^{d}--> Y denote the natural map from the d-fold fiber product, X^{d}, of X over Y …

[PDF][PDF] Applications of n-Gorenstein projective and injective modules

X Tang - Hacettepe Journal of Mathematics and Statistics, 2015 - dergipark.org.tr
Over a commutative noetherian ring, we introduce a generalization of Gorenstein projective
and injective modules, which we call, respectively, n-Gorenstein projective and injective …

A Bass formula for Gorenstein injective dimension

L Khatami, S Yassemi - Communications in Algebra®, 2007 - Taylor & Francis
A Bass Formula for Gorenstein Injective Dimension Page 1 Communications in Algebra®, 35:
1882–1889, 2007 Copyright © Taylor & Francis Group, LLC ISSN: 0092-7872 print/1532-4125 …

Reflexivity and rigidity for complexes. I. Commutative rings

LL Avramov, SB Iyengar, J Lipman - arXiv preprint arXiv:0904.4695, 2009 - arxiv.org
A notion of rigidity with respect to an arbitrary semidualizing complex C over a commutative
noetherian ring R is introduced and studied. One of the main result characterizes C-rigid …

Dual of the Auslander-Bridger formula and GF-perfectness

P Sahandi, T Sharif - Mathematica Scandinavica, 2007 - JSTOR
Ext-finite modules were introduced and studied by Enochs and Jenda. We prove under
some conditions that the depth of a local ring is equal to the sum of the Gorenstein injective …

Cohen-macaulay homological dimensions

P Sahandi, T Sharif, S Yassemi - arXiv preprint arXiv:1904.03586, 2019 - arxiv.org
We introduce new homological dimensions, namely the Cohen-Macaulay projective,
injective and flat dimensions for homologically bounded complexes. Among other things we …