$KK$-duality for self-similar groupoid actions on graphs
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- by Nathan Brownlowe, Alcides Buss, Daniel Gonçalves, Jeremy B. Hume, Aidan Sims and Michael F. Whittaker;
- Trans. Amer. Math. Soc. 377 (2024), 5513-5560
- DOI: https://doi.org/10.1090/tran/9183
- Published electronically: June 11, 2024
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Abstract:
We extend Nekrashevych’s $KK$-duality for $C^*$-algebras of regular, recurrent, contracting self-similar group actions to regular, contracting self-similar groupoid actions on a graph, removing the recurrence condition entirely and generalising from a finite alphabet to a finite graph.
More precisely, given a regular and contracting self-similar groupoid $(G,E)$ acting faithfully on a finite directed graph $E$, we associate two $C^*$-algebras, $\mathcal {O}(G,E)$ and $\widehat {\mathcal {O}}(G,E)$, to it and prove that they are strongly Morita equivalent to the stable and unstable Ruelle C*-algebras of a Smale space arising from a Wieler solenoid of the self-similar limit space. That these algebras are Spanier-Whitehead dual in $KK$-theory follows from the general result for Ruelle algebras of irreducible Smale spaces proved by Kaminker, Putnam, and the last author.
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Bibliographic Information
- Nathan Brownlowe
- Affiliation: School of Mathematics and Statistics, University of Sydney, Australia
- MR Author ID: 770264
- Email: nathan.brownlowe@sydney.edu.au
- Alcides Buss
- Affiliation: Departamento de Matemática, Universidade Federal de Santa Catarina, Brazil
- MR Author ID: 827256
- ORCID: 0000-0001-6796-9818
- Email: alcides.buss@ufsc.br
- Daniel Gonçalves
- Affiliation: Departamento de Matemática, Universidade Federal de Santa Catarina, Brazil
- MR Author ID: 819131
- ORCID: 0000-0002-8149-9872
- Email: daemig@gmail.com
- Jeremy B. Hume
- Affiliation: School of Mathematics and Statistics, University of Glasgow, United Kingdom
- ORCID: 0009-0001-5558-968X
- Email: jeremybhume@gmail.com
- Aidan Sims
- Affiliation: School of Mathematics and Applied Statistics, University of Wollongong, Australia
- MR Author ID: 671497
- ORCID: 0000-0002-1965-6451
- Email: asims@uow.edu.au
- Michael F. Whittaker
- Affiliation: School of Mathematics and Statistics, University of Glasgow, United Kingdom
- MR Author ID: 907763
- ORCID: 0000-0003-1293-0080
- Email: Mike.Whittaker@glasgow.ac.uk
- Received by editor(s): February 14, 2023
- Received by editor(s) in revised form: December 4, 2023
- Published electronically: June 11, 2024
- Additional Notes: The fifth author was supported by Australian Research Council grant DP220101631 and by CAPES grant 88887.370640. The second and third authors were partially supported by CNPq and CAPES - Brazil. The fourth author was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 817597).
- © Copyright 2024 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 377 (2024), 5513-5560
- MSC (2020): Primary 47L05, 19K35; Secondary 37B05
- DOI: https://doi.org/10.1090/tran/9183