The connected components on the projective line over a ring.
The connection between a (3,2)-semigroup automaton and a semigroup automaton
The connections between continued fraction representations of units and certain Hecke groups.
The Connes-Kasparov conjecture for almost connected groups and for linear -adic groups
Let G be a locally compact group with cocompact connected component. We prove that the assembly map from the topological K-theory of G to the K-theory of the reduced C*-algebra of G is an isomorphism. The same is shown for the groups of k-rational points of any linear algebraic group over a local field k of characteristic zero.
The construction of -solvable Abelian groups
The construction of orthogonal k-skeins and latin k-cubes.
The construction of semigroups from groups and semilattices
The converse of Schur's Lemma in group rings
In this paper, we study the structure of group rings by means of endomorphism rings of their modules. The main tools used here, are the subrings fixed by automorphisms and the converse of Schur's lemma. Some results are obtained on fixed subrings and on primary decomposition of group rings.
The Conway-Norton algebras for ?(6,3), ?(7,3), F'24, and their full automorphism groups.
The co-rank conjecture for 3-manifold groups.
The core congruence on a monoid.
The Core-Free Groups of Sylow-2-type M24.
The covariety of perfect numerical semigroups with fixed Frobenius number
Let be a numerical semigroup. We say that is an isolated gap of if A numerical semigroup without isolated gaps is called a perfect numerical semigroup. Denote by the multiplicity of a numerical semigroup . A covariety is a nonempty family of numerical semigroups that fulfills the following conditions: there exists the minimum of the intersection of two elements of is again an element of , and for all such that We prove that the set is a perfect numerical semigroup with...
The Coxeter group .
The cyclic homology of the group rings.
The cyclic subgroup separability of certain HNN extensions.
The -property of linear and unitary groups.
The decomposition numbers of Hecke algebras of type F4 with unequal parameters.
The Decomposition numbers of the Hecke algebra of type F4.
The Decomposition of Tensors over Fields of Prime Characteristic.