Noncommutative correspondence categories, simplicial sets and pro $C^*$-algebras

Details Noncommutative correspondence categories, simplicial sets and pro $C^*$-algebras Noncommutative correspondence categories, simplicial sets and pro $C^*$-algebras

2009-06-30

arxiv.org/abs/0906.5400v3

Mathematics

K-Theory and Homology

A brief discussion on homological $\mathbb{T}$-dualities added. Original material revised and made more concise. Still 24 page

Scientific paper

We show that a $KK$-equivalence between two unital $C^*$-algebras produces a correspondence between their DG categories of finitely generated projective modules which is a $\mathbf{K}_*$-equivalence, where $\mathbf{K}_*$ is Waldhausen's $K$-theory. We discuss some connections with strong deformations of $C^*$-algebras and homological dualities. Motivated by a construction of Cuntz we associate a pro $C^*$-algebra to any simplicial set. We show that this construction is functorial with respect to proper maps of simplicial sets, that we define, and also respects proper homotopy equivalences. We propose to develop a noncommutative proper homotopy theory in the context of topological algebras.

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