STRONGLY COPURE PROJECTIVE, INJECTIVE AND FLAT COMPLEXES

In this paper, we extend the notions of strongly copure projective, injective and flat modules to that of complexes and characterize these complexes. We show that the strongly copure projective precover of any finitely presented complex exists over n-FC rings, and a strongly copure injective envelope exists over left Noetherian rings. We prove that strongly copure flat covers exist over arbitrary rings and that (SCF,SCF perpendicular to) is a perfect hereditary cotorsion theory where SCF is the class of strongly copure flat complexes.