A 1 1/2-dimensional version of Hopf's Theorem on the number of ends of a group.
A Cohomological Property of Regular p-Groups.
A Connection between the Integral Homology and the Centre of a Rational Linear Group.
A Construction of Representations of Weyl Groups.
A Filtration of Schur Multiplicator.
A Functorial Transfer Theorem.
A generalized Hopf formula for higher homology groups.
A Group with Torsion-Free 2-Divisible Homology and Cappell's Result on the Novikov Conjecture.
A homological exact sequence associated with a family of normal subgroups
A Homological Finiteness Criterion.
A local method in group cohomology.
A Magnus-Witt type isomorphism for non-free groups.
A note on groups with torsion-free abelianization and trivial multiplicator.
A Relative cohomological invariant for group pairs.
A short proof of Eilenberg and Moore’s theorem
In this paper we give a short and simple proof the following theorem of S. Eilenberg and J.C. Moore: the only injective object in the category of groups is the trivial group.
A Specialization Theorem for Certain Weyl Group Representations and an Application to the Green Polynomials of Unitary Groups.
A split exact sequence of Mackey functors.
A splitting principle for group representations.
Active sums I.
Given a generating family F of subgroups of a group G closed under conjugation and with partial order compatible with inclusion, a new group S can be constructed, taking into account the multiplication in the subgroups and their mutual actions given by conjugation. The group S is called the active sum of F, has G as a homomorph and is such that S/Z(S) ≅ G/Z(G) where Z denotes the center.The basic question we investigate in this paper is: when is the active sum S of the family F isomorphic to the...
Acyclic groups of automorphisms.