Boosting hardmetals by using double carbides in the mix
- 作者：Ken Brookes
- 关键词：Endomorphism rings ; Modules ; Localization ; Margimorphism ; Marginal direct summand ; Unique direct sum ; Category ; Functor ; Equivalence ; Abelian group ; Jó ; nsson's Theorem
- 刊名：Metal Powder Report
- 出版年：2008
- 期刊代码：70_00260657
- 类别：ms
- 出版时间：May 2008
- 卷：63
- 期：5
- 页码：10-12,14,16-18
- 文件大小：999 K
摘要
Let G be a right module over a ring R and let QG denote the semi-primary classical right ring of quotients of EndR(G). Modules G and H are margimorphic if there are maps a:G→H and b:H→G such that ab and ba are regular elements in the respective endomorphism rings. The module H is called a marginal summand of G if G is margimorphic to H
H′ for some module H′. We study the existence and uniqueness of marginal summands of Gn for integers n>0 in terms of finitely generated projective right QG-modules. Some of these results extend to direct summands of Gn for integers n>0.
H′ for some module H′. We study the existence and uniqueness of marginal summands of Gn for integers n>0 in terms of finitely generated projective right QG-modules. Some of these results extend to direct summands of Gn for integers n>0.