Supported by National Natural Science Foundation of China(Grant Nos.11301240,11371187 and 11101197);the Young Scholars Science Foundation of Lanzhou Jiaotong University(Grant No.2012020)
In this paper,we give a relationship between projective generators(resp.,injective cogenerators) in the category of R-modules and the counterparts in the category of complexes of R-modules.As a consequence,we get th...