self orthogonal submodule

In this paper,it is proved that(C,T) is an n-cotilting pair if and only of CopresnXT(C)=⊥C∩XT,where T is selforthogonal module and T∈Presn(CopresnXT(C)).

设A为Artin代数,称一对有限生成左A-模(C,T)为倾斜对,如果C和T都是自正交模,并且有T∈addAC及C∈addAT。