Let R be a ring. A left R-module M is said to be min-injective if for any simple left ideal I. A
right R-module N is called min-flat if for any simple left ideal I. R is said to be a left min …

Let R be a ring. For a fixed positive integer n, R is said to be left n-semihereditary in case
every n-generated left ideal is projective. R is said to be weakly n-semihereditary if each n …

结合《 中兽医学》 课程的特点, 针对以往教学中存在的中兽医理论比较抽象, 内容繁杂枯燥,
理论与实践脱节, 教学方法陈旧以及学生不易接受, 难以理解等诸多问题 …

In this paper, we introduce a new generalization of coherent rings. Let m be a positive
integer and da positive integer or d=∞. A ring R is called a left (m, d)-coherent ring in case …

设R 是任意带单位元的结合环, 一个左R-模K 被称为是左(n, d) 平坦的. 如果对任意的n
表现的右R-模M, 均有Tord+ 1 (M, K)= 0. 给出了(n, d) 平坦左R-模的几个性质, 用(n, d) 平坦左R …