上三角矩阵半环U2(R,M)
2021-10-28张理江石定琴
张理江 石定琴
摘 要:该文在给定的半模M上定义了上三角矩阵半环U2(R,M),并利用环论的方法研究了它的相关性质,得到半环U2(R,M)是加法幂等的充分必要条件是模R是加法幂等的,半环U2(R,M)是零和自由的充分必要条件是半环R和半模模M都是零和自由的,以及其子半环的特征。在同构意义下,得到任何半环R都可以自然嵌入到半环U2(R,M)中。
关键词:半环 半模 子半环 同构
中图分类号:O153.3 文献标识码:A文章编号:1672-3791(2021)07(b)-0193-03
Upper Triangular Matrix Semiring U2(R,M)
ZHANG Lijiang SHI Dingqin
(College of Science, Jiujiang University, Jiujiang, Jiangxi Province, 332005 China)
Abstract: In this paper, the author defines the semiring U2(R,M) on the basis of the semi-module M, and studies its related properties on the method of ring theory, gets the necessary and sufficient condition that semiring U2(R,M) is additive idempotent is that the semiring R is additive idempotent, and necessary and sufficient conditions for a semiring U2(R,M) to be additive idempotent, zero sum free, and the characteristics of its sub semirings are obtained. In the sense of isomorphism, it is obtained that any semiring R can be naturally embedded in semirings U2(R,M).
Key Words: Semiring; Semimodule; Subsemiring; Isomorphism
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