查看文章

In [10], Wei has defined quasi-projective modules to characterize star modules and tilting modules. The main aim of this paper is to find the relationship between the 1-quasi-projective module and any module in Pres∞. For this aim, some properties of Add-resolutions of modules when right derived functors act on them, are described. Then some classes of modules such as (,)-projective and (+ 1