Let R be a ring and n, k two non-negative integers. In this paper, we introduce the concepts
of n-weak injective and n-weak flat modules and via the notion of special super finitely …

Let R be a strong n-coherent ring such that each finitely n-presented R-module has finite
projective dimension. We consider ℱ 𝒫 n (R) the full subcategory of R-Mod of finitely n …

(n,d)-(Ext)- phantom 态射与(n,d)-环* Page 1 第63 卷第1 期 2024 年1 月 Vol. 63 No. 1 Jan.
2024 中山大学学报(自然科学版)(中英文) ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS …

arXiv:2401.05506v1 [math.KT] 10 Jan 2024 Page 1 arXiv:2401.05506v1 [math.KT] 10 Jan 2024
ON THE COHERENCY OF COMPLETED GROUP ALGEBRAS DAVID BURNS, YU KUANG …

Let $ G $ be a finite group acting on a ring $ R $ and $ H $ a subgroup of $ G $. In this paper
we compare some homological dimensions over the skew group rings $ RG $ and $ RH …

Let C be a class of some finitely presented left R-modules. A left R-module M is called C-
injective, if Ext R 1 (C, M)= 0 for each C∈ C. A right R-module M is called C-flat, if Tor 1 R …

本文给出了(n, 0)-内射模的推广Gorenstein (n, 0)-内射模的定义并得出了Gorenstein (n, 0)-
内射模的一些同调性质, 并讨论了R 是右n-凝聚Noether 环, 且R 是余生成子时, Gorenstein (n …

(nꎬd)-phantom与(nꎬd)-Ext-phantom态射 Page 1 山东大学学报(理学版)2023年2月第58卷第2期
E-mail:xblxb@sdu.edu.cn Journal of Shandong University(Natural Science)ꎬ Vol.58ꎬ No.2ꎬ …

Let R be a ring, and let n, d be non-negative integers. A right R-module M is called (n, d)-
projective if Ext d+ 1 R (M, A)= 0 for every n-copresented right R-module A. R is called right n …

Let S and R be rings, SCR a (faithfully) semidualizing bi-module, and n 1 a natural number.
In this paper, we introduce the concepts of C-fpn-injective and C-fpn-at modules. Then we …