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We prove that the Farrell-Jones assembly map for connective algebraic K-theory is rationally injective, under mild homological finiteness conditions on the group and assuming that a weak version of the Leopoldt-Schneider conjecture holds…

K-Theory and Homology · Mathematics 2016-09-22 Wolfgang Lueck , Holger Reich , John Rognes , Marco Varisco

In this paper we show that the Farrell-Jones isomorphism conjectures are inherited in group extensions for assembly maps in algebraic $K$-theory and $L$-theory with twisted coefficients.

K-Theory and Homology · Mathematics 2013-02-12 Ian Hambleton , Erik K. Pedersen , David Rosenthal

We construct an equivariant coarse homology theory arising from the algebraic $K$-theory of spherical group rings and use this theory to derive split injectivity results for associated assembly maps. On the way, we prove that the…

K-Theory and Homology · Mathematics 2021-05-28 Ulrich Bunke , Daniel Kasprowski , Christoph Winges

The Addition Theorem for the algebraic entropy of group endomorphisms of torsion abelian groups was proved in [4]. Later, this result was extended to all abelian groups [3] and, recently, to all torsion finitely quasihamiltonian groups [7].…

Group Theory · Mathematics 2022-09-13 Menachem Shlossberg

We study the controlled dynamics of the {\it ensembles of points} of a Riemannian manifold $M$. Parameterized ensemble of points of $M$ is the image of a continuous map $\gamma:\Theta \to M$, where $\Theta$ is a compact set of parameters.…

Optimization and Control · Mathematics 2019-07-08 Andrei Agrachev , Andrey Sarychev

We prove various results connecting structural or algebraic properties of graphs and groups to conditions on their spaces of harmonic functions. In particular: we show that a group with a finitely supported symmetric measure has a…

Group Theory · Mathematics 2016-09-22 Matthew Tointon

A main theme of the paper is a conjecture of Bloch-Kato on the image of $p$-adic regulator maps for a proper smooth variety $X$ over an algebraic number field $k$. The conjecture for a regulator map of particular degree and weight is…

Algebraic Geometry · Mathematics 2009-01-22 Shuji Saito , Kanetomo Sato

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

The Addition Theorem for the algebraic entropy of group endomorphisms of torsion abelian groups was proved by Dikranjan, Goldsmith, Salce and Zanardo. It was later extended by Shlossberg to torsion nilpotent groups of class 2. As our main…

Group Theory · Mathematics 2026-01-26 Menachem Shlossberg

We give continued fraction algorithms for a particular class of Fuchsian triangle groups. In particular, we give an explicit form of each such group that is a subgroup of the Hilbert modular group of its trace field and provide an interval…

Number Theory · Mathematics 2011-03-11 Kariane Calta , Thomas Schmidt

We show that, given a compact Hausdorff space $\Omega$, there is a compact group ${\mathbb G}$ and a homeomorphic embedding of $\Omega$ into ${\mathbb G}$, such that the restriction map ${\rm A}({\mathbb G})\to C(\Omega)$ is a complete…

Functional Analysis · Mathematics 2016-01-11 Yemon Choi

For certain families of compact subsets of the plane, the isomorphism class of the algebra of absolutely continuous functions on a set is completely determined by the homeomorphism class of the set. This is analogous to the…

Functional Analysis · Mathematics 2021-05-31 Shaymaa Al-shakarchi , Ian Doust

We describe the structure of "K-approximate subgroups'' of solvable subgroups of GL_n(C), showing that they have a large nilpotent piece. By combining this with the main result of our recent paper on approximate subgroups of torsion-free…

Group Theory · Mathematics 2009-07-07 Emmanuel Breuillard , Ben Green

We present module theory and linear maps as a powerful generalised and computationally efficient framework for the relational data model, which underpins today's relational database systems. Based on universal constructions of modules we…

Programming Languages · Computer Science 2022-07-05 Fritz Henglein , Robin Kaarsgaard , Mikkel Kragh Mathiesen

This paper extends the notion of geometric control in algebraic K-theory from additive categories with split exact sequences to other exact structures. In particular, we construct exact categories of modules over a Noetherian ring filtered…

K-Theory and Homology · Mathematics 2014-12-12 Gunnar Carlsson , Boris Goldfarb

Controlled topology is one of the main tools for proving the isomorphism conjecture concerning the algebraic $K$-theory of group rings. In this article we dive into this machinery in two examples: when the group is infinite cyclic and when…

K-Theory and Homology · Mathematics 2019-08-05 Eugenia Ellis , Emanuel Rodríguez Cirone , Gisela Tartaglia , Santiago Vega

We apply the effective integration theory of Lie-graph algebras, developed recently by the authors, to the deformation and homotopy theories of types of bialgebras, that is structures controlled by a properad, like associative bialgebras,…

Quantum Algebra · Mathematics 2025-10-10 Ricardo Campos , Bruno Vallette

The present paper shows that the bounded control set of a linear system on a connected Lie group $G$ contains all the bounded orbits of the system. As a consequence, its closure is the continuous image of the cartesian product of the set of…

Optimization and Control · Mathematics 2022-01-20 Victor Ayala , Adriano Da Silva

We show that the relative Farrell-Jones assembly map from the family of finite subgroups to the family of virtually cyclic subgroups for algebraic K-theory is split injective in the setting where the coefficients are additive categories…

K-Theory and Homology · Mathematics 2016-08-31 Wolfgang Lueck , Wolfgang Steimle

We study possibilities to control an ensemble (a parameterized family) of nonlinear control systems by a single parameter-independent control. Proceeding by Lie algebraic methods we establish genericity of exact controllability property for…

Optimization and Control · Mathematics 2016-03-24 A. Agrachev , Yu. Baryshnikov , A. Sarychev