摘要
本文引进了双投射子的概念,给出了投射子,完全投射子与双投射子的一些新的刻划,讨论了环R上的有限生成投射模的自同态环与环R的关系.
In this paper, bi-projectors are defined. Some new representations of projectors, perfect projectors and bi - projectors are given. Some relations between endomorphism ring of finitely generated projective modules over R and ring R are discussed.
