• NONSINGULAR PQ-INJECTIVE MODULES

Abstract

Let be a right -module. A right -module  is called nonsingular principally -injective (briefly, nonsingular -injective) if, for each any -homomorphism from to  can be extended to an -homomorphism from  to  is called nonsingular principally quasi –injective (briefly, nonsingular -injective)  if, it is nonsingular -injective. In this paper, we give some characterizations and properties of nonsingular -injective modules.