<正> Let R be a ring.A right R-module M with S=End(MR)is called aquasi AP-injective module,if,for any s ∈ S,there exists a left ideal X_s of S such thatl_s(ker
The purpose of this paper is to make a further study on the abstract economy.Here,for the constraint correspondences we assume that they are alomost lowe semi-c