Let ZG be the integral group ring of a group G, and I(G) its augmentation ideal. For a free group F and a subgroup Rof F, the intersections I3(F) ∩ I2(R) and I
In this paper, we classify metacyclic p-groups of nilpotency class at least three up to isomorphism by giving a canonical presentation for each isomorphism clas
In this paper, we introduce the notion of △’-reflexive modules. We investigate the reflexive modules with respect to a partial cotilting (bi)module and obtain
There is a complete cohomology theory developed over a commutative noetherian ring in which injectives take the role of projectives in Vogel’s construction of
Let G be a group with a set Ω of operators such that Z(G) is Ω-admissible. Central Ω-automorphisms occur in the Krull-Remak-Schmidt Theorem. We discuss the e
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