On the Farrell–Jones conjecture for
Waldhausen’s A–theory

Enkelmann, Nils-Edvin; Lück, Wolfgang; Pieper, Malte; Ullmann, Mark; Winges, Christoph

doi:10.2140/gt.2018.22.3321

Cited by 13 publications

(28 citation statements)

References 62 publications

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“…(ii) This is proved in [8,Lemma 6.18] notice that ∆ and incl 1 commutes; (iii) This is proved in [8, Proposition 6.15(iii)], which follows from the "squeezing (v) This is [8, Proposition 6.15(ii)]; (vi) The map tr 2 can be defined as in [8,Section 7] with some modifications. We explain now how this should proceed based on the terminology and proof there.…”

Section: 4mentioning

confidence: 99%

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The isomorphism conjecture for solvable groups in Waldhausen’s A-theory

Farrell

2019

J. Topol. Anal.

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Section: 4mentioning

confidence: 99%

“…We explain now how this should proceed based on the terminology and proof there. Firstly by [8,Remark 7.3], it suffices to define a transfer functor…”

Section: 4mentioning

confidence: 99%

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The isomorphism conjecture for solvable groups in Waldhausen’s A-theory

Farrell

2019

J. Topol. Anal.

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“…However, proofs of the Farrell-Jones Conjecture in K-and L-theory are by now very parallel. Recently, the techniques for the Farrell-Jones Conjecture in K-and L-theory have been extended to also cover Waldhausen's A-theory [25,47,74]. In particular, the conditions we will discuss in Section 2 are now known to imply the Farrell-Jones Conjecture in all three theories.…”

Section: The Formulation Of the Farrell-jones Conjecturementioning

confidence: 99%

“…Remark 2.13. Groups satisfying the assumptions of Theorem 2.12 are said to be homotopy transfer reducible in [25]. The original formulations of Theorems 2.6 and 2.12 were not in terms of almost equivariant maps, but in terms of certain open covers of G×X.…”

Section: Remark 29 a Natural Question Is Which Groups Admit Finitelmentioning

confidence: 99%

K-THEORY AND ACTIONS ON EUCLIDEAN RETRACTS

Bartels¹

2019

Proceedings of the International Congress of Mathematicians (ICM 2018)

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This note surveys axiomatic results for the Farrell-Jones Conjecture in terms of actions on Euclidean retracts and applications of these to GLn(Z), relative hyperbolic groups and mapping class groups. IntroductionMotivated by surgery theory Hsiang [43] made a number of influential conjectures about the K-theory of integral group rings Z[G] for torsion free groups G. These conjectures often have direct implications for the classification theory of manifolds of dimension ≥ 5. A good example is the following. An h-cobordism is a compact manifold W that has two boundary components M 0 and M 1 such that both inclusions M i → W are homotopy equivalences. The Whitehead group Wh(G) is the quotient of K 1 (Z[G]) by the subgroup generated by the canonical units ±g, g ∈ G. Associated to an h-cobordism is an invariant, the Whitehead torsion, in Wh(G), where G is the fundamental group of W . A consequence of the s-cobordism theorem is that for dim W ≥ 6, an h-cobordism W is trivial (i.e., isomorphic to a product M 0 ×[0, 1]) iff its Whitehead torsion vanishes. Hsiang conjectured that for G torsion free Wh(G) = 0, and thus that in many cases h-cobordisms are products.The Borel conjecture asserts that closed aspherical manifolds are topologically rigid, i.e., that any homotopy equivalence to another closed manifold is homotopic to a homeomorphism. The last step in proofs of instances of this conjecture via surgery theory uses a vanishing result for Wh(G) to conclude that an h-cobordism is a product and that therefore the two boundary components are homeomorphic.Farrell-Jones [28] pioneered a method of using the geodesic flow on non-positively curved manifolds to study these conjectures. This created a beautiful connection between K-theory and dynamics that led Farrell-Jones [30], among many other results, to a proof of the Borel Conjecture for closed Riemannian manifolds of nonpositive curvature of dimension ≥ 5. Moreover, Farrell-Jones [29] formulated (and proved many instances of) a conjecture about the structure of the algebraic Ktheory (and L-theory) of group rings, even in the presence of torsion in the group. Roughly, the Farrell-Jones Conjecture states that the main building blocks for the K-theory of Z[G] is the K-theory of Z[V ] where V varies of the family of virtually cyclic subgroups of G. It implies a number of other conjectures, among them Hsiang's conjectures, the Borel Conjecture in dimension ≥ 5, the Novikov Conjecture on the homotopy invariant of higher signatures, Kaplansky's conjecture about idempotents in group rings, see [54] for a summary of these and other applications.My goal in this note is twofold. The first goal is to explain a condition formulated in terms of existence of certain actions of G on Euclidean retracts that implies the Farrell-Jones Conjecture for G. This condition was developed in joint work with Lück and Reich [8,12] where the connection between K-theory and dynamics has

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The Farrell–Jones conjecture for normally poly-free groups

Brück

Kielak

2021

Proc. Amer. Math. Soc.

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On the Farrell–Jones conjecture for Waldhausen’s A–theory

Cited by 13 publications

References 62 publications

The isomorphism conjecture for solvable groups in Waldhausen’s A-theory

The isomorphism conjecture for solvable groups in Waldhausen’s A-theory

K-THEORY AND ACTIONS ON EUCLIDEAN RETRACTS

The Farrell–Jones conjecture for normally poly-free groups

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