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We show that for various natural classes of groups and appropriately defined K- and L-theoretic functors, injectivity or bijectivity of the assembly map follows from the Isomorphism Conjecture being true for acyclic groups lying within that…

K-Theory and Homology · Mathematics 2017-03-07 Crichton Ogle , Shengkui Ye

Controlled $K$-theory is used to show that algebraic $K$-theory of virtually abelian groups is described by an assembly map defined using possibly-infinite hyperelementary subgroups. The Farrell-Jones summand (coming from infinite…

K-Theory and Homology · Mathematics 2007-05-23 Frank Quinn

We prove the K-theoretic Farrell-Jones conjecture with (twisted) coefficients for CAT(0)-groups.

Geometric Topology · Mathematics 2011-03-30 Christian Wegner

We show how to compute a certain group of equivalence classes of invariant Drinfeld twists on the algebra of a finite group G over a field k of characteristic zero. This group is naturally isomorphic to the second lazy cohomology group of…

Quantum Algebra · Mathematics 2013-01-17 Pierre Guillot , Christian Kassel

We prove the A-theoretic Isomorphism Conjecture with coefficients and finite wreath products for solvable groups.

K-Theory and Homology · Mathematics 2017-10-10 F. Thomas Farrell , Xiaolei Wu

For a recollement of derived module categories of rings, we provide sufficient conditions to guarantee the additivity formula of higher algebraic K-groups of the rings involved, and establish a long Mayer-Vietoris exact sequence of higher…

K-Theory and Homology · Mathematics 2014-05-21 Hongxing Chen , Changchang Xi

We introduce the Farrell-Jones Conjecture with coefficients in an additive category with G-action. This is a variant of the Farrell-Jones Conjecture about the algebraic K- or L-Theory of a group ring RG. It allows to treat twisted group…

K-Theory and Homology · Mathematics 2007-05-23 Arthur Bartels , Holger Reich

Let G be a group and k a field of characteristic zero. We prove that if the Farrell-Jones conjecture for the K-theory of R[G] is satisfied for every smooth k-algebra R, then it is also satisfied for every commutative k-algebra R.

K-Theory and Homology · Mathematics 2016-03-09 Guillermo Cortiñas , Emanuel Rodríguez Cirone

This is the first of three articles on the Fibered Isomorphism Conjecture of Farrell and Jones for L-theory. We apply the general techniques developed in [15] and [16] to the L-theory case of the conjecture and prove several results. Here…

K-Theory and Homology · Mathematics 2011-03-03 S. K. Roushon

We prove an equivariant version of the fact that word-hyperbolic groups have finite asymptotic dimension. This is important in connection with our forthcoming proof of the Farrell-Jones conjecture in algebraic K-theory for every…

Geometric Topology · Mathematics 2008-02-29 Arthur Bartels , Wolfgang Lueck , Holger Reich

It is proved that the assembly maps in algebraic K- and L-theory with respect to the family of finite subgroups is injective for groups with finite asymptotic dimension that admit a finite model for the classifying space for proper actions.…

K-Theory and Homology · Mathematics 2016-09-23 Arthur Bartels , David Rosenthal

In this paper we provide descriptions of the Whitehead groups with coefficients in a ring of the Hilbert modular group and its reduced version, as well as for the topological K-theory of $C^*$-algebras, after tensoring with $\mathbb{Q}$, by…

K-Theory and Homology · Mathematics 2017-06-16 Luis Jorge Sánchez Saldaña , Mario Velásquez

Motivated by the Farrell-Jones Conjecture for group rings, we formulate the $\mathcal{C}$op-Farrell-Jones Conjecture for the K-theory of Hecke algebras of td-groups. We prove this conjecture for (closed subgroups of) reductive p-adic groups…

K-Theory and Homology · Mathematics 2023-12-22 Arthur Bartels , Wolfgang Lueck

For every natural number k we introduce the notion of k-th order convolution of functions on abelian groups. We study the group of convolution preserving automorphisms of function algebras in the limit. It turns out that such groups have…

Combinatorics · Mathematics 2010-01-26 Balazs Szegedy

We prove the K- and L-theoretic Farrell-Jones Conjecture (with coefficients in additive categories) for GL_n(Z).

K-Theory and Homology · Mathematics 2013-05-08 Arthur Bartels , Wolfgang Lueck , Holger Reich , Henrik Rueping

We compute the algebraic K-theory of the Hecke algebra of a reductive p-adic group G using the fact that the Farrell-Jones Conjecture is known in this context. The main tool will be the properties of the associated Bruhat-Tits building and…

K-Theory and Homology · Mathematics 2025-05-21 Arthur Bartels , Wolfgang Lueck

Let F be a finite group with a Sylow 2-subgroup S that is normal and abelian. Using hyperelementary induction and cartesian squares, we prove that Cappell's unitary nilpotent groups UNil_*(Z[F];Z[F],Z[F]) have an induced isomorphism to the…

Geometric Topology · Mathematics 2008-11-24 Qayum Khan

We first prove that the K-theoretic Hall algebra of a preprojective algebra of affine type is isomorphic to the positive half of a quantum toroidal quantum group. An essential step consists to deform the K-theoretic Hall algebra so that the…

Representation Theory · Mathematics 2022-03-30 Michela Varagnolo , Eric Vasserot

We investigate the relative assembly map from the family of finite subgroups to the family of virtually cyclic subgroups for the algebraic $K$-theory of twisted group rings of a group G with coefficients in a regular ring R or, more…

K-Theory and Homology · Mathematics 2024-08-02 Wolfgang Lueck

We prove the K- and L-theoretic Farrell-Jones Conjecture (with coefficients in additive categories) for virtually solvable groups.

Geometric Topology · Mathematics 2017-05-17 Christian Wegner