Derivation in Subdivectly Irreducible Rings

Abstract:

      Let R be a subdirectly irreducible ring, U be a nonzero ideal of R, J be a unique min-imal ideal of R, R_l, Rr, U_l, U_r, J_l,J_r, respectively the left annihilator and right annihilator of R, U, J.In this