摘要
引入了半模的投射盖和半模的根的初步的定义 ,给出了半模范畴中投射盖和根的几个初步的结果 ,推广了模的投射盖和根的一些性质 .
In this paper, we introduce the preliminary definition about projective covers and radical of semimodules, some preliminary results about them are presented in the category of semimodules, which generalize some properties of projective covers and radical in the category of module.
出处
《数学研究》
CSCD
2004年第4期421-425,430,共6页
Journal of Mathematical Study
关键词
半模的投射盖
半模的根
投射半模
多余子半模
优半模
Projective covers of semimodules
radical of semimodules
projective semimodules
superfluous subsemimodules
well-semimodules
