KK-and E-theory via homotopy theory
U Bunke - arXiv preprint arXiv:2304.12607, 2023 - arxiv.org
We provide a homotopy theorist's point of view on $ KK $-and $ E $-theory for $ C^{*} $-
algebras. We construct stable $\infty $-categories representing these theories through a …
algebras. We construct stable $\infty $-categories representing these theories through a …
On the quantitative coarse Baum-Connes conjecture with coefficients
J Zhang - arXiv preprint arXiv:2410.11929, 2024 - arxiv.org
In this paper, we introduce the quantitative coarse Baum-Connes conjecture with coefficients
(or QCBC, for short) for proper metric spaces which refines the coarse Baum-Connes …
(or QCBC, for short) for proper metric spaces which refines the coarse Baum-Connes …
[PDF][PDF] Controlled KK-theory I: a Milnor exact sequence
We introduce controlled KK-theory groups associated to a pair pA, Bq of separable C-
algebras. Roughly, these consist of elements of the usual K-theory group K0pBq that …
algebras. Roughly, these consist of elements of the usual K-theory group K0pBq that …
Conditional representation stability, classification of -homomorphisms, and relative eta invariants
R Willett - arXiv preprint arXiv:2408.13350, 2024 - arxiv.org
A quasi-representation of a group is a map from the group into a matrix algebra (or similar
object) that approximately satisfies the relations needed to be a representation. Work of …
object) that approximately satisfies the relations needed to be a representation. Work of …
Hilbert-Hadamard spaces and the equivariant coarse Novikov conjecture
L Guo, Q Wang, J Wu, G Yu - arXiv preprint arXiv:2411.18538, 2024 - arxiv.org
In this paper, we study the equivariant coarse Novikov conjectures for spaces that
equivariantly and coarsely embed into admissible Hilbert-Hadamard spaces, which are a …
equivariantly and coarsely embed into admissible Hilbert-Hadamard spaces, which are a …
The relative Mishchenko–Fomenko higher index and almost flat bundles II: Almost flat index pairing
Y Kubota - Journal of Noncommutative Geometry, 2022 - ems.press
This is the second part of a series of papers which bridges the Chang–Weinberger–Yu
relative higher index and geometry of almost flat Hermitian vector bundles on manifolds with …
relative higher index and geometry of almost flat Hermitian vector bundles on manifolds with …
Slant products on the Higson–Roe exact sequence
We construct a slant product/: Sp (X× Y)× K1− q (credY)→ Sp− q (X) on the analytic structure
group of Higson and Roe and the K-theory of the stable Higson corona of Emerson and …
group of Higson and Roe and the K-theory of the stable Higson corona of Emerson and …
Localization algebras and index pairing
H Wang, C Zhang, D Zhou - Journal of Homotopy and Related Structures, 2023 - Springer
Kasparov KK-theory for a pair of C∗-algebras (A, B) can be formulated equivalently in terms
of the K-theory of Yu's localization algebra by Dadarlat-Willett-Wu. We investigate the …
of the K-theory of Yu's localization algebra by Dadarlat-Willett-Wu. We investigate the …
[PDF][PDF] Bott periodicity and almost commuting matrices
R Willett - arXiv preprint arXiv:1901.03774, 2019 - researchgate.net
We give a proof of the Bott periodicity theorem for topological K-theory of C-algebras based
on Loring's treatment of Voiculescu's almost commuting matrices and Atiyah's rotation trick …
on Loring's treatment of Voiculescu's almost commuting matrices and Atiyah's rotation trick …