NC-Rings and Some Commutativity Conditions

来源 :理论数学进展(英文) | 被引量 : 0次 | 上传用户:februaryliao
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Sum of two nilpotent elements in a ring may not be nilpotent in general, but for commutative rings this sum is nilpotent. In between commutative and non-commutative rings there are several types of rings in which this property holds. For instance, reduced
其他文献
Zoonosis is an important factor affecting human economic development and population mortality. This paper introduces a general model of zoonosis, in which the d
数据备份工作在现代通信专网系统运行维护和管理中具有独特的必要性和重要性。备份的类别、组合方法、管理模式等问题直接关系到专网通信系统能否正常运行。对专网通信系统数
To the best of our knowledge no multicenter studies have been published using standardized semi-quantitative evaluation of [123I]FP-CIT scan (DAT-SPECT). The ai
从铁电薄膜和铁电颗粒两大方面回顾了处理尺寸效应的理论研究方法(包括宏观的热力学唯像理论、微观的横场Ising模型和第一性原理计算)和铁电相变临界尺寸的理论预测.总结了从50
三河尖煤矿的KZ-1型微震监测系统利用D值优化准则确定了10个拾震器的最优布置方案;拾震器具备了三分向记录、系统定量标定功能,安装在距巷道底板6~8m的深孔套管中;采用光缆传输,增
常规除尘技术主要分为通风除尘、湿式作业密闭抽尘、净化风流及个体防护等几种。分析了现阶段常规除尘、抑尘技术现状,阐述了化学抑尘剂的抑尘机理,并在现场进行了成功应用,取得
采用溶胶-凝胶法制备了1mol%、3mol%、5mol%、8mol%Ho^3+掺杂的Ba(0.65)Sr(0.35)TiO3薄膜,研究了薄膜的表面AFM、XRD谱、光学透射谱和光致发光谱.结果表明:Ho^3+浓度从1mol%增加到8m
To explore the possibility to use 1.5 T MRI in imaging of accumulating gadolinium (Gd) into inflamed en- docrine pancreas (insulitis), we compared intravenously
In analogy to the role of Lommel polynomials ?in relation to Bessel functions Jv(z) the theory of Associated Hermite polynomials in the scaled form ?with parmet
近年来,我国传统的审计模式同高校会计电算化的快速发展很不适应。目前相关部门的计算机审计无论是在理论还是实务上,都远落后于高校的会计电算化。在实务方面,由于计算机审计起