Existence of Covers over Fixed Rings

• Autores: Juan Ramón García Rozas , Blas Torrecillas Jover
• Localización: Rings, Hopf algebras, and Brauer groups: proceedings of the fourth week on algebra and algebraic geometry / Stefaan Caenepeel (ed. lit.) , A. Verschoren (ed. lit.) , 1998, ISBN 0-8247-0153-4, págs. 159-166
• Idioma: inglés
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• Resumen

  • 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.