摘要
证明了如果M1和M2都是CS-模且M1是M2-o jective模,M2是基本M1-o jective模,那么M1 M1仍是CS-模.
Let M1 and M2 be CS modules. It is proved that if M1 is M2-ojective and M2 is essentially M1-ojective, the direct sum of M1 and M2 is CS modules.
出处
《甘肃科学学报》
2005年第3期1-2,共2页
Journal of Gansu Sciences
基金
兰州理工大学科研发展基金资助项目(SB10200412)