态射和短正合列的预包络关于直和的封闭性  

Preenvelope of Morphisms and Short Exact Sequences on the Closure ofDirect Sum

作　　者：刘诗瑶 杨晓燕 

机构地区：[1]西北师范大学,数学与统计学院,甘肃 兰州

出　　处：《理论数学》2023年第5期1508-1515,共8页Pure Mathematics

摘　　要：本文利用左 R-模的预包络关于直和的封闭性, 研究了态射和短正合序列的预包络关于直和的封闭性。In this paper, we study that the preenvelopes of morphisms and short exact sequences are closed under direct sums using the fact that the preenvelope of left R-module isclosed under direct sums.

关 键 词：预包络 直和 封闭性 

分 类 号：TN9[电子电信—信息与通信工程]