The AH conjecture for Cantor minimal dihedral systems
DOI:
https://doi.org/10.7146/math.scand.a-136741Abstract
The AH conjecture relates the low-dimensional homology groups of a groupoid with the abelianization of its topological full group. We show that transformation groupoids of minimal actions of the infinite dihedral group on the Cantor set satisfy this conjecture. The proof uses Kakutani–Rokhlin partitions adapted to such systems.
References
Baake, M., Roberts, J. A. G., and Yassawi, R., Reversing and extended symmetries of shift spaces, Discrete Contin. Dyn. Syst. 38 (2018), no. 2, 835–866. https://doi.org/10.3934/dcds.2018036
Bratteli, O., Evans, D. E., and Kishimoto, A., Crossed products of totally disconnected spaces by $Z_2*Z_2$, Ergodic Theory Dynam. Systems 13 (1993), no. 3, 445–484. https://doi.org/10.1017/S0143385700007483
Damanik, D., and Zare, D., Palindrome complexity bounds for primitive substitution sequences, Discrete Math. 222 (2000), no. 1–3, 259–267. https://doi.org/10.1016/S0012-365X(00)00054-6
Deeley, R. J., A counterexample to the HK-conjecture that is principal, Ergodic Theory Dynam. Systems, to appear.
Giordano, T., Putnam, I. F., and Skau, C. F., Full groups of Cantor minimal systems, Israel J. Math. 111 (1999), 285–320. https://doi.org/10.1007/BF02810689
Grigorchuk, R. I., and Medinets, K. S., On the algebraic properties of topological full groups, Mat. Sb. 205 (2014), no. 6, 87–108; translation in Sb. Math. 205 (2014), no. 5–6, 843–861. https://doi.org/10.1070/sm2014v205n06abeh004400
Jiang, Y., On continuous orbit equivalence rigidity for virtually cyclic group actions, Groups, Geom. Dyn., to appear. arXiv:2106.06221.
Li, X., Ample groupoids, topological full groups, algebraic K-theory spectra and infinite loop spaces, arXiv:2209.08087
Matui, H., Homology and topological full groups of étale groupoids on totally disconnected spaces, Proc. Lond. Math. Soc. (3) 104 (2012), no. 1, 27–56. https://doi.org/10.1112/plms/pdr029
Matui, H., Topological full groups of one-sided shifts of finite type, J. Reine Angew. Math. 705 (2015), 35–84. https://doi.org/10.1515/crelle-2013-0041
Matui, H., Étale groupoids arising from products of shifts of finite type, Adv. Math. 303 (2016), 502–548. https://doi.org/10.1016/j.aim.2016.08.023
Nekrashevych, V., Simple groups of dynamical origin, Ergodic Theory Dynam. Systems 39 (2019), no. 3, 707–732. https://doi.org/10.1017/etds.2017.47
Nyland, P., and Ortega, E., Katsura-Exel-Pardo groupoids and the AH conjecture, J. Lond. Math. Soc. (2) 104 (2021), no. 5, 2240–2259. https://doi.org/10.1112/jlms.12496
Nyland, P., and Ortega, E., Matui's AH conjecture for graph groupoids, Doc. Math. 26 (2021), 1679–1727.
Nyland, P., Ample groupoids and their topological full groups, Ph.D. thesis, 2020. Available at texttt https://hdl.handle.net/11250/2678011.
Ortega, E., and Sanchez, A., The homology of the groupoid of the self-similar infinite dihedral group, Math. Scand. 128 (2022), no. 2, 255–277. https://doi.org/10.7146/math.scand.a-129708
Ortega, E., and Scarparo, E., Almost finiteness and homology of certain non-free actions, Groups Geom. Dyn. 17 (2023), no. 1, 77–90.
Scarparo, E., Homology of odometers, Ergodic Theory Dynam. Systems 40 (2020), no. 9, 2541–2551. https://doi.org/10.1017/etds.2019.13
Thomsen, K., The homoclinic and heteroclinic $C^*$-algebras of a generalized one-dimensional solenoid, Ergodic Theory Dynam. Systems 30 (2010), no. 1, 263–308. https://doi.org/10.1017/S0143385709000042