Almost split sequence containing projective module 包含投射模的幾乎可裂序列
On radical - projective modules 關于根投射模
It has introduced that quasi - principally projective modules , and get some new characterizations of weakly projective modules 摘要引進了擬主投射模的概念,給出了它們相關性質(zhì),由此對弱投射模進行了新的刻畫。
百科解釋
In mathematics, particularly in abstract algebra and homological algebra, the concept of projective module over a ring R is a generalisation of the idea of a free module (that is, a module with basis vectors). Various equivalent characterizations of these modules appear below.