套代数模的紧扰动与M-理想

本文研究了算子局部子空间与套代数模的紧扰动M-理想性质,给出了套代数模紧扰动最佳逼近的一些性质,推广了[1]中的结果。     

Stonean kernels of MS-algebras

In this paper, the internal structures of MS-algebras are investigated by means of the new notions of Stonean kernel and M-ideal. We determine necessary and sufficient conditions for an MS-algebra with a Kleene skeleton. After introducing a special kind of principal congruence, we consider the relationship between an MS-algebra and its quotient algebra. Supported by the National Natural Science Foundation of China Luo Congwen: born in 1965, Ph.D.     

关于Olson和Jenkins定义的根类

ＤｗｉｇｈｔＭ．Ｏｌｓｏｎ和ＴｅｒｒｙＬ．Ｊｅｎｋｉｎｓ［４］定义了由任意环类确定的一种根类（Ｍ）．一个环Ｒ∈（Ｍ）当且仅当Ｒ的每一个非零同态象或者包含一个非零Ｍ理想或者有本质理想．他们提出两个需要进一步讨论的问题．对于一个同态闭环类Ｍ，（Ｍ）和由Ｍ生成的低根类（Ｍ）有什么关系？对于一个正则环类Ｍ，是否有环类Ｎ使得上根（Ｍ）＝（Ｎ）？本文将对这两个问题给出回答并讨论这种根类簇的性质．