Warfield Invariants of

Abstract

Let be a commutativeunitary ring of prime characteristic and let be an Abelian group. We calculateonly in terms of and (and their sections)Warfield -invariants of thequotient group , that is, the group of all normalized units in the groupring modulo . This supplies recent results of ours in (Extr. Math., 2005),(Collect. Math., 2008) and (J. Algebra Appl., 2008).