伪投射半模

Pseudo-projective Semimodule

将伪投射模的概念推广至半模中,探讨了它的一些性质,并且利用泛性质定义半模的伪投射盖,还对其性质做了某些探讨。

We extend the definition of the pseudo-projective module to semimodules, and probe its some properties. We define the Pseudo-projective covers of semimodule with universal properties, and probe its some properties.