Resumen de Existence of Covers over Fixed Rings

Juan Ramón García Rozas, Blas Torrecillas Jover

• In this paper, tau-torsion tau-injective covers are studied for tau any hereditary torsion theory. We are mainly interested here in the Preserving Question of covers among R-Mod, R * G-Mod and R-G-Mod, where G is a finite group acting on R.