Let R be any ring. A right R-module M is called n-copure projective if Ext1 (M, N)= 0 for any
right R-module N with fd (N)≤ n, and M is said to be strongly copure projective if Ext i (M, F) …

Let R be a ring, na fixed nonnegative integer and In (Fn) the class of all left (right) R-modules
of injective (flat) dimension at most n. A left R-module M (resp., right R-module F) is called n …

Let R be a left coherent ring. We first prove that a right R-module M is strongly copure flat if
and only if Ext i (M, C)= 0 for all flat cotorsion right R-modules C and i≥ 1. Then we define …

余纯<i>FP_n</i>平坦模 高级检索 2.{{subColumn.name}} 西南大学学报(自然科学
版) 高级搜索 {{newsColumn.name}} 1.{{subColumn.name}} 留言板 尊敬的读者,作者,审稿人 …

An integral domain R is said to be locally G-Dedekind if the Gorenstein global dimension of
R 𝔪 is at most one for each maximal ideal 𝔪. In this paper, we show that an integral domain …

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设R 是环, F∞ 表示平坦维数有限的左R-模类. 左R-模M 称为∞-余纯投射模, 指对任意N∈ F∞
都有Ext^ R1 (M, N)= 0. 证明∞-余纯投射模M 是投射模当且仅当M∈ F∞, 同时证明当l. FFD …

RINGS OF COPURE PROJECTIVE DIMENSION ONE -Journal of the Korean Mathematical
Society Article Info. 1.Home 2.Article Info. Journal of the Korean Mathematical Society (대한수 …

Let $ R $ be a commutative ring. An $ R $-module $ M $ is said to be $ w $-flat if $\Tor^{R} _
{1}(M, N) $ is $ GV $-torsion for any $ R $-module $ N $. It is known that every flat module is …

Let R be a ring. A right R-module M is called GI-flat if TorR 1 (M, G)= 0 for every Gorenstein
injective left R-module G. It is shown that GI-flat modules lie strictly between flat modules and …