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Wieler solenoids, Cuntz–Pimsner algebras and $K$-theory

Published online by Cambridge University Press:  02 May 2017

ROBIN J. DEELEY ,
MAGNUS GOFFENG ,
BRAM MESLAND  and
MICHAEL F. WHITTAKER
ROBIN J. DEELEY
Affiliation:
Department of Mathematics, University of Hawaii, 2565 McCarthy Mall, Keller 401A, Honolulu HI 96822, USA email robin.deeley@gmail.com
MAGNUS GOFFENG
Affiliation:
Department of Mathematical Sciences, Chalmers University of Technology and The University of Gothenburg, SE-412 96 Gothenburg, Sweden email goffeng@chalmers.se
BRAM MESLAND
Affiliation:
Institut für Analysis, Leibniz Universität, Welfengarten 1, 30167 Hannover, Germany email mesland@math.uni-hannover.de
MICHAEL F. WHITTAKER
Affiliation:
School of Mathematics and Statistics, University of Glasgow, UK email Mike.Whittaker@glasgow.ac.uk
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Abstract

We study irreducible Smale spaces with totally disconnected stable sets and their associated $K$-theoretic invariants. Such Smale spaces arise as Wieler solenoids, and we restrict to those arising from open surjections. The paper follows three converging tracks: one dynamical, one operator algebraic and one $K$-theoretic. Using Wieler’s theorem, we characterize the unstable set of a finite set of periodic points as a locally trivial fibre bundle with discrete fibres over a compact space. This characterization gives us the tools to analyse an explicit groupoid Morita equivalence between the groupoids of Deaconu–Renault and Putnam–Spielberg, extending results of Thomsen. The Deaconu–Renault groupoid and the explicit Morita equivalence lead to a Cuntz–Pimsner model for the stable Ruelle algebra. The $K$-theoretic invariants of Cuntz–Pimsner algebras are then studied using the Cuntz–Pimsner extension, for which we construct an unbounded representative. To elucidate the power of these constructions, we characterize the Kubo–Martin–Schwinger (KMS) weights on the stable Ruelle algebra of a Wieler solenoid. We conclude with several examples of Wieler solenoids, their associated algebras and spectral triples.

Type
Original Article
Information
Ergodic Theory and Dynamical Systems , Volume 38 , Issue 8 , December 2018 , pp. 2942 - 2988
Copyright
© Cambridge University Press, 2017 

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